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A030271 Number of nonisomorphic groupoids with 1 idempotent and no symmetry. 5
1, 4, 1431, 75491208 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A278844 A036107 A201390 * A301576 A160088 A094546
KEYWORD
nonn,more
AUTHOR
STATUS
approved

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Last modified November 29 06:17 EST 2023. Contains 367422 sequences. (Running on oeis4.)