A030256 Number of nonisomorphic commutative groupoids with a nontrivial symmetry.

0, 0, 0, 13, 540, 232767

Offset

0,4

Links

Table of n, a(n) for n=0..5.

Index entries for sequences related to groupoids

Crossrefs

A001425 - A030255.

Sequence in context: A295942 A297518 A281055 * A023332 A309204 A229263

Adjacent sequences: A030253 A030254 A030255 * A030257 A030258 A030259

Keyword

nonn,more

Author

Christian G. Bower

Status

approved