A321230 Number of set partitions of [n^2] into n n-element subsets having the same sum.

1, 1, 1, 2, 392, 3245664, 6534071578530

Offset: 0

Author

Alois P. Heinz, Oct 31 2018

Keywords

• nonn
• more

Examples

			a(0) = 1: empty.
a(1) = 1: 1.
a(2) = 1: 14|23.
a(3) = 2: 168|249|357, 159|267|348.
		

Links

• Wikipedia, Partition of a set

Crossrefs

Main diagonal of A203986.

Cf. A006003, A037270, A052456, A104185, A321282.

Formula

a(n) = A203986(n,n).