A030255 Number of nonisomorphic commutative groupoids with no symmetry.

1, 1, 4, 116, 43428, 254197133

Offset

0,3

Links

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

Index entries for sequences related to groupoids

Crossrefs

a(n) = A079185(n, A027423(n)). Cf. A001425.

Sequence in context: A198080 A272158 A194535 * A146508 A374676 A365450

Adjacent sequences: A030252 A030253 A030254 * A030256 A030257 A030258

Keyword

nonn,more

Author

Christian G. Bower

Status

approved