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A030259 Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry. 1
0, 0, 0, 4, 38, 1894 (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

A030257 - A030258.

Sequence in context: A093377 A178017 A131591 * A218710 A286877 A018860

Adjacent sequences:  A030256 A030257 A030258 * A030260 A030261 A030262

KEYWORD

nonn,more

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified April 21 20:41 EDT 2019. Contains 322328 sequences. (Running on oeis4.)