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A030249 Number of nonisomorphic idempotent groupoids with a nontrivial symmetry. 0
0, 0, 2, 30, 3187 (list; graph; refs; listen; history; text; internal format)
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: A099929 A136636 A220719 * A000187 A053851 A077521

Adjacent sequences:  A030246 A030247 A030248 * A030250 A030251 A030252

KEYWORD

nonn,more

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified May 16 20:11 EDT 2022. Contains 353720 sequences. (Running on oeis4.)