A030252 Number of nonisomorphic groupoids with no idempotents and a nontrivial symmetry.

0, 0, 2, 9, 15376

Offset

0,3

Links

Table of n, a(n) for n=0..4.

Index entries for sequences related to groupoids

Crossrefs

Cf. A030250 - A030251.

Sequence in context: A027734 A328201 A028581 * A325624 A049384 A132859

Adjacent sequences: A030249 A030250 A030251 * A030253 A030254 A030255

Keyword

nonn,more

Author

Christian G. Bower

Status

approved