A087314 a(n) = (1/n) * Sum_{k = 0..n} n^binomial(n,k).

2, 4, 20, 1154, 3907502, 609516468354242, 108233912076063807870514781000, 205688069665244291374160325606433848956971528595913979304345602, 381367496233593231179533022742555015402552706280473714446093438118953849830784189071820024395733993533363857256493600698

Offset: 1

Author

Amarnath Murthy, Sep 03 2003

Keywords

• nonn

Examples

			a(3) = 1/3*{ 3^1 +3^3+3^3+3^1} = 20.
		

Crossrefs

Cf. A001315.

Programs

PARI

a(n) = sum(k = 0, n, n^binomial(n, k))/n; \\ David Wasserman, May 02 2005

Extensions

More terms from David Wasserman, May 02 2005