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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

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Last modified May 15 11:13 EDT 2024. Contains 372540 sequences. (Running on oeis4.)