A062815 a(n) = Sum_{i=1..n} i^(i+1).

1, 9, 90, 1114, 16739, 296675, 6061476, 140279204, 3627063605, 103627063605, 3242055440326, 110235260819398, 4047611646518687, 159615707204330911, 6728024062917221536, 301875929242270047392, 14364960381309995038401

Offset: 1

Author

Olivier Gérard, Jun 23 2001

Keywords

• nonn
• easy

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..385

Crossrefs

Cf. A226065, A226140.

Partial sums of A007778. - Michel Marcus, Mar 26 2019

Programs

Mathematica

Accumulate[#^(#+1)&/@Range[17]]  (* Harvey P. Dale, Mar 18 2011 *)

PARI

a(n) = sum(i=1, n, i^(i+1)); \\ Michel Marcus, Mar 26 2019

Extensions

Definition simplified by Jon E. Schoenfield, Nov 29 2008