A030258 Number of nonisomorphic commutative idempotent groupoids with no symmetry.

1, 1, 1, 3, 164, 80461

Offset

0,4

Links

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

Index entries for sequences related to groupoids

Crossrefs

Sequence in context: A212845 A212806 A368600 * A154737 A285488 A112896

Adjacent sequences: A030255 A030256 A030257 * A030259 A030260 A030261

Keyword

nonn,more

Author

Christian G. Bower

Status

approved