A017250 a(n) = (9*n + 7)^6.

117649, 16777216, 244140625, 1544804416, 6321363049, 19770609664, 51520374361, 117649000000, 243087455521, 464404086784, 832972004929, 1418519112256, 2313060765625, 3635215077376, 5534900853769

Offset

0,1

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

G.f.: -(117649 + 15953673*x + 129170742*x^2 + 184023862*x^3 + 51600417*x^4 + 1771113*x^5 + 64*x^6) /(x-1)^7. - R. J. Mathar, Mar 20 2018

Prog

(Magma) [(9*n+7)^6: n in [0..30]]; // Vincenzo Librandi, Jul 27 2011

Crossrefs

Sequence in context: A016926 A016986 A017154 * A017358 A017478 A017610

Adjacent sequences: A017247 A017248 A017249 * A017251 A017252 A017253

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved