A030250 Number of nonisomorphic groupoids with no idempotents.

1, 0, 3, 978, 56630832, 813802235250650, 4797611106478930201025520, 17327898558894838031017212608777367670, 53493753018329066207577438898229132113128344235601408

Offset

0,3

Links

Table of n, a(n) for n=0..8.

Index entries for sequences related to groupoids

Crossrefs

Cf. A001329, A038018.

Sequence in context: A324443 A151585 A286525 * A145231 A318480 A358269

Adjacent sequences: A030247 A030248 A030249 * A030251 A030252 A030253

Keyword

nonn

Author

Christian G. Bower, Feb 15 1998 and May 15 1998

Status

approved