A058155 Number of labeled commutative monoids of order n.

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

Offset: 1

Author

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

Keywords

• nonn
• more

Links

• Eric Postpischil, Posting to sci.math newsgroup, May 21 1990
• Index entries for sequences related to monoids

Crossrefs

Cf. A058156.

Row sums of A058159.

Formula

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

Extensions

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

a(10) from Andrew Howroyd, Feb 15 2022