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My sequences in OEISA072377 — Number of pairs of orthogonal Latin squares of order N (was known before me) A129732 — Number of main classes (species) of Graeco-Latin squares of order N (was known before me) A266167 — Number of isotopism classes of unordered pairs of orthogonal Latin squares of order N (was known before me) A266168 — Number of isotopism classes of ordered pairs of orthogonal Latin squares of order N (was known before me)
Last updated: Feb 26 2023