A030249 Number of nonisomorphic idempotent groupoids with a nontrivial symmetry.

0, 0, 2, 30, 3187

Offset

0,3

Links

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

Index entries for sequences related to groupoids

Crossrefs

A030247 - A030248.

Sequence in context: A136636 A220719 A359665 * A000187 A053851 A369681

Adjacent sequences: A030246 A030247 A030248 * A030250 A030251 A030252

Keyword

nonn,more

Author

Christian G. Bower

Status

approved