A163948 The number of functions on a finite set that are obtainable by a composition power (excluding identity as power).

1, 4, 21, 172, 1725, 21066, 307111

Offset

1,2

Comments

The complementary set to A163947.

Links

Table of n, a(n) for n=1..7.

Formula

a(n) = n^n - A163947(n).

Crossrefs

Cf. A163947, see also A102687, A163859, A163860, A163861.

Sequence in context: A217484 A078670 A317104 * A278993 A306067 A230682

Adjacent sequences: A163945 A163946 A163947 * A163949 A163950 A163951

Keyword

more,nonn

Author

Carlos Alves, Aug 06 2009

Status

approved