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A058106 Number of self-converse asymmetric semigroups of order n. +0
2
1, 1, 3, 9, 44, 271, 2246, 33672 (list; graph; listen)
OFFSET

0,3
LINKS

Index entries for sequences related to semigroups

CROSSREFS

Cf. A029851.

Sequence in context: A136732 A108239 A028858 this_sequence A021103 A001902 A068100

Adjacent sequences: A058103 A058104 A058105 this_sequence A058107 A058108 A058109

KEYWORD

nonn,hard

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Nov 09 2000

EXTENSIONS

Updated Feb 19 2001

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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