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A030253
Number of nonisomorphic groupoids with 1 idempotent.
2
1, 4, 1485, 75503872, 1017252851596875, 5757133327963849592814528, 20215881652044379995902152075055222830, 61135717735233219050448568789931104340315383312314368
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..8.
Index entries for sequences related to groupoids
CROSSREFS
Sequence in context:
A160088
A094546
A203035
*
A278549
A229664
A361449
Adjacent sequences:
A030250
A030251
A030252
*
A030254
A030255
A030256
KEYWORD
nonn
AUTHOR
Christian G. Bower
, Feb 15 1998 and May 15 1998
STATUS
approved
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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)