A168351 a(n) = n^5*(n+1)/2.

0, 1, 48, 486, 2560, 9375, 27216, 67228, 147456, 295245, 550000, 966306, 1617408, 2599051, 4033680, 6075000, 8912896, 12778713, 17950896, 24760990, 33600000, 44925111, 59266768, 77236116, 99532800, 126953125, 160398576, 200884698

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).

Formula

a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} Sum_{m=1..n} (i+j+k-l-m). - Wesley Ivan Hurt, Aug 13 2015

Mathematica

Table[n^5*(n + 1)/2, {n, 0, 40}] (* Wesley Ivan Hurt, Aug 13 2015 *)

Prog

(Magma) [n^5*(n+1)/2: n in [0..30]]; // Vincenzo Librandi, Aug 28 2011

Crossrefs

Sequence in context: A229505 A299785 A299787 * A198398 A211149 A034778

Adjacent sequences: A168348 A168349 A168350 * A168352 A168353 A168354

Keyword

nonn,easy

Author

N. J. A. Sloane, Dec 11 2009

Status

approved