A058155 - OEIS

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A058155

Number of labeled commutative monoids of order n.

4

1, 4, 27, 376, 7430, 233340, 10013094, 618332080, 70437029472, 39048511536720

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

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

Index entries for sequences related to monoids

FORMULA

a(n) = A058156(n)*n.

CROSSREFS

Row sums of A058159.

Sequence in context: A203202 A320961 A239726 * A334527 A104169 A359904

Adjacent sequences: A058152 A058153 A058154 * A058156 A058157 A058158

KEYWORD

nonn,more

AUTHOR

Christian G. Bower, Nov 14 2000, corrected Dec 05 2003

EXTENSIONS

a(8)-a(9) from Alex Meiburg, Oct 20 2021

a(10) from Andrew Howroyd, Feb 15 2022

STATUS

approved