A058143 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A058143

Number of commutative monoids of order n with 2 idempotents.

1

1, 3, 9, 26, 98, 455, 4018, 101910, 10054303

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,2

LINKS

Table of n, a(n) for n=2..10.

Index entries for sequences related to monoids

CROSSREFS

Column 2 of A058142.

Sequence in context: A148921 A148922 A148923 * A126025 A317497 A114181

Adjacent sequences: A058140 A058141 A058142 * A058144 A058145 A058146

KEYWORD

nonn,more

AUTHOR

Christian G. Bower, Nov 14 2000

EXTENSIONS

a(8)-a(10) from Andrew Howroyd, Feb 15 2022

STATUS

approved