A262926 Sum of n consecutive n-th powers starting with n^n.

0, 1, 31, 3408, 873580, 405071029, 295716738515, 312086923732368, 449317984129326216, 846136323944158864793, 2018612200059553898143707, 5949463230586042065279268128, 21227845340442717633531647231668, 90172805592203250075964230466892813

Offset: 0

Author

Colin Barker, Oct 04 2015

Keywords

• nonn
• easy

Examples

			a(3) = 3^3 + 4^4 + 5^5 = 3408.
		

Crossrefs

Cf. A050410, A240137, A262925.

Programs

Mathematica

Table[Sum[k^k, {k, n, 2 n - 1}], {n, 0, 13}] (* Michael De Vlieger, Oct 05 2015 *)

PARI

vector(20, n, n--; sum(k=n, 2*n-1, k^k))

Sage

[sum(k^k for k in (n..2*n-1)) for n in (0..20)] # Bruno Berselli, Oct 05 2015