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A030256 Number of nonisomorphic commutative groupoids with a nontrivial symmetry. 0
0, 0, 0, 13, 540, 232767 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

Index entries for sequences related to groupoids

CROSSREFS

A001425 - A030255.

Sequence in context: A295942 A297518 A281055 * A023332 A309204 A229263

Adjacent sequences:  A030253 A030254 A030255 * A030257 A030258 A030259

KEYWORD

nonn,more

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified January 28 17:21 EST 2022. Contains 350657 sequences. (Running on oeis4.)