A378870 - OEIS

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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A378870

a(n) = number of non-constantive transformation monoids on n elements.

%I #5 Dec 10 2024 09:02:53

%S 0,4,357,328865421

%N a(n) = number of non-constantive transformation monoids on n elements.

%H M. Behrisch, <a href="https://doi.org/10.34726/4663">Counting and enumerating transformation monoids</a>, 103rd Workshop on General Algebra (Estonia, 2023).

%F a(n) = A343140(n) - A378869(n).

%Y Cf. A343140, A378869, A378871.

%K hard,nonn,more

%O 1,2

%A _Max Alekseyev_, Dec 09 2024