A017140 a(n) = (8*n+6)^4.

1296, 38416, 234256, 810000, 2085136, 4477456, 8503056, 14776336, 24010000, 37015056, 54700816, 78074896, 108243216, 146410000, 193877776, 252047376, 322417936, 406586896, 506250000, 623201296

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

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).

Programs

Magma

[(8*n+6)^4: n in [0..35]]; // Vincenzo Librandi, Jul 22 2011

Mathematica

(8*Range[0,20]+6)^4 (* or  *) LinearRecurrence[{5,-10,10,-5,1},{1296,38416,234256,810000,2085136},20] (* Harvey P. Dale, Sep 21 2021 *)

Formula

G.f.: ( -1296-31936*x-55136*x^2-9920*x^3-16*x^4 ) / (x-1)^5. - R. J. Mathar, Aug 26 2015

a(n) = 16*A016840(n). - R. J. Mathar, Aug 26 2015