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A350020 Number of species containing semisymmetric Latin squares of order n. 1
1, 1, 1, 2, 2, 7, 28, 366, 13899, 1968997, 934327507 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Species (also called "main classes") are the largest natural equivalence classes of Latin squares.

LINKS

Table of n, a(n) for n=1..11.

Brendan D. McKay and Ian M. Wanless, Enumeration of Latin squares with conjugate symmetry, J. Combin. Des. 30 (2022), 105-130.

CROSSREFS

Cf. A076016, A076017, A350019.

Sequence in context: A221648 A138802 A292016 * A047003 A067352 A240978

Adjacent sequences: A350017 A350018 A350019 * A350021 A350022 A350023

KEYWORD

nonn

AUTHOR

Ian Wanless, Dec 08 2021

STATUS

approved

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Last modified December 5 02:30 EST 2022. Contains 358572 sequences. (Running on oeis4.)