0,3

Alois P. Heinz, Table of n, a(n) for n = 0..584

Wikipedia, Partition of a set

a(n) = A287216(n,4).

a(n) = A000110(n) for n <= 5.

Column k=4 of A287216.

Cf. A000110.

Sequence in context: A279559 A056272 A140980 * A220912 A108304 A220913

Adjacent sequences: A287251 A287252 A287253 * A287255 A287256 A287257

nonn

Alois P. Heinz, May 22 2017

approved