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A058135
Number of asymmetric self-converse monoids (semigroups with identity) of order n.
3
1, 2, 4, 13, 54, 322, 2545
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..7.
Index entries for sequences related to monoids
CROSSREFS
a(n)=
A058136
(n)*2-
A058130
(n).
Sequence in context:
A030886
A030810
A346550
*
A030968
A030862
A030923
Adjacent sequences:
A058132
A058133
A058134
*
A058136
A058137
A058138
KEYWORD
nonn
,
more
AUTHOR
Christian G. Bower
, Nov 13 2000
STATUS
approved
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Last modified August 18 22:11 EDT 2024. Contains 375284 sequences. (Running on oeis4.)