A058106 Number of self-converse asymmetric semigroups of order n.

1, 1, 3, 9, 44, 271, 2246, 33672

Offset

0,3

Links

Table of n, a(n) for n=0..7.

Index entries for sequences related to semigroups

Crossrefs

Cf. A029851.

Sequence in context: A218921 A262128 A028858 * A021103 A222662 A209977

Adjacent sequences: A058103 A058104 A058105 * A058107 A058108 A058109

Keyword

nonn,hard

Author

Christian G. Bower, Nov 09 2000

Extensions

Updated Feb 19 2001

Status

approved