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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with OASIS Tables with MathML3 v1.4 20241031//EN" "https://jats.nlm.nih.gov/archiving/1.4/JATS-archive-oasis-article1-4-mathml3.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Дальневосточный математический журнал</journal-title></journal-title-group><issn publication-format="print">1608-845X</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.47910/FEMJ202612</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">Формулы сложения для частного случая последовательности Сомос-</article-title><trans-title-group xml:lang="en"><trans-title>Addition formulae for a special case of the Somos 6 sequence</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Романов</surname><given-names>M. A.</given-names></name><name xml:lang="en"><surname>Romanov</surname><given-names>M. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><email>romanov@iam.dvo.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8444-4722</contrib-id></contrib><aff-alternatives id="aff1"><aff><institution xml:lang="en">Khabarovsk Division of the Institute of Applied Mathematics Far Eastern Branch of the Russian Academy of Sciences</institution><city xml:lang="en">Khabarovsk</city><country xml:lang="en">Russia</country></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="ru">Хабаровское отделение Института прикладной математики Дальневосточного отделения Российской академии наук</institution><city xml:lang="ru">Хабаровск</city><country xml:lang="ru">Россия</country></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2026-06-15"><day>15</day><month>06</month><year>2026</year></pub-date><volume>26</volume><issue>1</issue><fpage>110</fpage><lpage>122</lpage><history><date date-type="received" iso-8601-date="2025-08-21"><day>21</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-05-25"><day>25</day><month>05</month><year>2026</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:title="CC BY 4.0"><ali:license_ref>https://creativecommons.org/licenses/by/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY 4.0</license-p></license></permissions><self-uri xlink:href="http://femj.iam.dvo.ru/periodical.php?art=579" xlink:title="http://femj.iam.dvo.ru/periodical.php?art=579">http://femj.iam.dvo.ru/periodical.php?art=579</self-uri><self-uri content-type="pdf" xlink:href="publication-adc3df19-6eed-4de1-b5af-e91cc5392a8b.pdf" xlink:title="PDF"/><abstract xml:lang="ru"><p>Найдены формулы сложения для частного случая последовательности Сомос-6.</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>Addition formulae for a special case of the Somos 6 sequence are found.</p></abstract><kwd-group xml:lang="ru"><kwd>последовательности Сомоса</kwd><kwd>последовательности конечного ранга</kwd><kwd>формулы сложения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Somos sequences</kwd><kwd>sequences of finite rank</kwd><kwd>addition formulae</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания ИПМ ДВО РАН (№ 075-00460-26-00).</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state assignment of the Institute of Problems of Applied Mathematics FEB RAS (No. 075-00460-26-00).</funding-statement></funding-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Авдеева М. 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