A017236 a(n) = (9*n + 6)^4.

1296, 50625, 331776, 1185921, 3111696, 6765201, 12960000, 22667121, 37015056, 57289761, 84934656, 121550625, 168896016, 228886641, 303595776, 395254161, 506250000, 639128961, 796594176, 981506241, 1196883216, 1445900625, 1731891456, 2058346161, 2428912656

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

Formula

G.f.: -81*(16 + 545*x + 1131*x^2 + 251*x^3 + x^4)/(x-1)^5. - R. J. Mathar, Mar 20 2018

Mathematica

(9*Range[0, 20]+6)^4 (* or *) LinearRecurrence[{5, -10, 10, -5, 1}, {1296, 50625, 331776, 1185921, 3111696}, 20] (* Harvey P. Dale, Aug 01 2022 *)

Prog

(Magma) [(9*n+6)^4: n in [0..35]]; // Vincenzo Librandi, Jul 25 2011

Crossrefs

Sequence in context: A152071 A223437 A183618 * A265478 A017344 A223689

Adjacent sequences: A017233 A017234 A017235 * A017237 A017238 A017239

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved