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A058131 Number of commutative monoids (commutative semigroups with identity) of order n. 2
0, 1, 2, 5, 19, 78, 421, 2637 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

LINKS

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

Remigiusz Durka, Kamil Grela, On the number of possible resonant algebras, arXiv:1911.12814 [hep-th], 2019.

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

EXTENSIONS

a(0) prepended by Jianing Song, Oct 26 2019

STATUS

approved

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Last modified October 26 19:14 EDT 2020. Contains 338027 sequences. (Running on oeis4.)