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A058129 Number of monoids (semigroups with identity) of order n. 11
1, 2, 7, 35, 228, 2237, 31559, 1668997 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

Eric Postpischil, Posting to sci.math newsgroup, May 21 1990

Index entries for sequences related to monoids

CROSSREFS

a(n)=A058133(n)*2-A058132(n).

Sequence in context: A014307 A000154 A003713 * A101514 A247240 A266356

Adjacent sequences:  A058126 A058127 A058128 * A058130 A058131 A058132

KEYWORD

nonn,hard,more

AUTHOR

Christian G. Bower, Nov 13 2000

EXTENSIONS

a(8) from Christian G. Bower, Dec 26 2006

STATUS

approved

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Last modified March 27 02:45 EDT 2017. Contains 284144 sequences.