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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
CROSSREFS
Sequence in context: A295942 A297518 A281055 * A023332 A309204 A229263
KEYWORD
nonn,more
AUTHOR
STATUS
approved

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)