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A058131 Number of commutative monoids (commutative semigroups with identity) of order n. 1
1, 2, 5, 19, 78, 421, 2637 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

S. Wolfram, A New Kind of Science. Champaign, IL: Wolfram Media, p. 952, 2002.

LINKS

Table of n, a(n) for n=1..7.

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

Eric Weisstein's World of Mathematics, Commutative Monoid

Eric Weisstein's World of Mathematics, Additive Cellular Automaton

Index entries for sequences related to monoids

CROSSREFS

Sequence in context: A150026 A150027 A277969 * A222055 A228569 A204328

Adjacent sequences:  A058128 A058129 A058130 * A058132 A058133 A058134

KEYWORD

nonn,more

AUTHOR

Christian G. Bower, Nov 13 2000

STATUS

approved

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Last modified March 24 05:55 EDT 2017. Contains 283984 sequences.