%I #18 Mar 26 2019 11:50:58
%S 1,9,90,1114,16739,296675,6061476,140279204,3627063605,103627063605,
%T 3242055440326,110235260819398,4047611646518687,159615707204330911,
%U 6728024062917221536,301875929242270047392,14364960381309995038401
%N a(n) = Sum_{i=1..n} i^(i+1).
%H Seiichi Manyama, <a href="/A062815/b062815.txt">Table of n, a(n) for n = 1..385</a>
%t Accumulate[#^(#+1)&/@Range[17]] (* _Harvey P. Dale_, Mar 18 2011 *)
%o (PARI) a(n) = sum(i=1, n, i^(i+1)); \\ _Michel Marcus_, Mar 26 2019
%Y Cf. A226065, A226140.
%Y Partial sums of A007778. - _Michel Marcus_, Mar 26 2019
%K nonn,easy
%O 1,2
%A _Olivier GĂ©rard_, Jun 23 2001
%E Definition simplified by _Jon E. Schoenfield_, Nov 29 2008