A247059 Number of endofunctions on [n] that are the n-th power of an endofunction.

1, 1, 3, 19, 73, 1281, 3136, 169681, 844929, 22607353, 169431706

Offset

0,3

Links

Table of n, a(n) for n=0..10.

Example

a(3) = 19: (1,1,1), (1,1,3), (1,2,1), (1,2,2), (1,2,3), (1,3,2), (1,3,3), (2,1,1), (2,1,2), (2,1,3), (2,2,2), (2,2,3), (2,3,2), (3,1,1), (3,2,1), (3,2,3), (3,3,1), (3,3,2), (3,3,3).

Crossrefs

Main diagonal of A247026.

Sequence in context: A215802 A202041 A245507 * A243142 A174286 A336589

Adjacent sequences: A247056 A247057 A247058 * A247060 A247061 A247062

Keyword

nonn,more

Author

Alois P. Heinz, Sep 10 2014

Extensions

a(8)-a(10) from Bert Dobbelaere, Jan 25 2019

Status

approved