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A030264 Number of nonisomorphic commutative groupoids with 1 idempotent and no symmetry. 2
1, 2, 51, 18330, 104124850 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

Index entries for sequences related to groupoids

CROSSREFS

Sequence in context: A210907 A099368 A132492 * A129742 A105647 A080921

Adjacent sequences:  A030261 A030262 A030263 * A030265 A030266 A030267

KEYWORD

nonn,more

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified January 16 10:47 EST 2021. Contains 340204 sequences. (Running on oeis4.)