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A030249
Number of nonisomorphic idempotent groupoids with a nontrivial symmetry.
1
0, 0, 2, 30, 3187
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..4.
Index entries for sequences related to groupoids
CROSSREFS
A030247
-
A030248
.
Sequence in context:
A136636
A220719
A359665
*
A000187
A053851
A369681
Adjacent sequences:
A030246
A030247
A030248
*
A030250
A030251
A030252
KEYWORD
nonn
,
more
AUTHOR
Christian G. Bower
STATUS
approved
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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)