A378870 a(n) = number of non-constantive transformation monoids on n elements.

0, 4, 357, 328865421

Offset

1,2

Links

Table of n, a(n) for n=1..4.

M. Behrisch, Counting and enumerating transformation monoids, 103rd Workshop on General Algebra (Estonia, 2023).

Formula

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

Crossrefs

Cf. A343140, A378869, A378871.

Sequence in context: A214233 A334359 A203034 * A215827 A366469 A051955

Adjacent sequences: A378867 A378868 A378869 * A378871 A378872 A378873

Keyword

hard,nonn,more

Author

Max Alekseyev, Dec 09 2024

Status

approved