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A058109 Semigroups of order n with 1 idempotent. +0
2
1, 2, 5, 20, 171, 5284, 1224331 (list; graph; listen)
OFFSET

1,2
LINKS

Index entries for sequences related to semigroups

CROSSREFS

Column 1 of A058108.

Sequence in context: A111885 A159320 A156871 this_sequence A005331 A158872 A006893

Adjacent sequences: A058106 A058107 A058108 this_sequence A058110 A058111 A058112

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 24 23:16 EST 2009. Contains 167481 sequences.

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