A163859 Number of different cubes of mappings of a finite set of n elements into itself.

1, 1, 4, 19, 116, 985, 11026, 145621, 2199240, 37942785, 743755750

Offset: 0

Author

Carlos Alves, Aug 05 2009

Keywords

• more
• nonn

Comments

The same as A102687, but now for cubic compositions, a(n) is the number of different mappings g that admit at least one mapping f as the cubic root (g=fofof) in terms of the composition.

Crossrefs

Column k=3 of A247026.

Extensions

a(0) from Alois P. Heinz, Sep 09 2014

a(8)-a(10) from Bert Dobbelaere, Jan 24 2019