A058110 Semigroups of order n with 2 idempotents.

3, 9, 50, 309, 2806, 58583

Offset

2,1

Links

Table of n, a(n) for n=2..7.

Index entries for sequences related to semigroups

Crossrefs

Column 2 of A058108.

Sequence in context: A012063 A036751 A260156 * A261542 A079836 A171951

Adjacent sequences: A058107 A058108 A058109 * A058111 A058112 A058113

Keyword

nonn,hard

Author

Christian G. Bower, Nov 09 2000

Extensions

Updated Feb 19 2001

Status

approved