A057992 Number of commutative quasigroups of order n.

1, 1, 1, 3, 7, 11, 491, 6381, 10940111, 1225586965, 130025302505741, 252282619993126717, 2209617218725712597768722, 98758655816833782283724345637

Offset

0,4

Links

Table of n, a(n) for n=0..13.

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

Index entries for sequences related to quasigroups

Crossrefs

Cf. A057991-A057994, A057771, A057996, A035481, A350009, A350010.

Sequence in context: A116605 A361090 A323339 * A082600 A355314 A351103

Adjacent sequences: A057989 A057990 A057991 * A057993 A057994 A057995

Keyword

nonn,more

Author

Christian G. Bower, Nov 01 2000

Extensions

Added a(7) = 6381, W. Edwin Clark, Jan 04 2011

a(8)-a(13) from Ian Wanless, Dec 08 2021

Status

approved