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A181592 Number of isomorphism classes of idempotent self-orthogonal Latin squares of order n. 0
1, 0, 0, 1, 2, 0, 8, 8, 283, 243284 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
A self-orthogonal Latin square (SOLS) is a Latin square orthogonal to its transpose. Two SOLS L and L' are isomorphic if a permutation applied to the rows, columns and symbols of L maps L to L'.
REFERENCES
G. P. Graham and C. E. Roberts, 2006. Enumeration and isomorphic classification of self-orthogonal Latin squares, Journal of Combinatorial Mathematics and Combinatorial Computing, 59, pp. 101-118.
LINKS
A. P. Burger, M. P. Kidd and J. H. van Vuuren, 2010. Enumerasie van self-ortogonale Latynse vierkante van orde 10, LitNet Akademies (Natuurwetenskappe), 7(3), pp 1-22.
CROSSREFS
Sequence in context: A287855 A287542 A288197 * A332616 A097348 A271034
KEYWORD
nonn
AUTHOR
Martin P Kidd, Nov 01 2010
STATUS
approved

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Last modified February 21 22:50 EST 2024. Contains 370239 sequences. (Running on oeis4.)