A017226 a(n) = (9*n + 5)^6.

15625, 7529536, 148035889, 1073741824, 4750104241, 15625000000, 42180533641, 98867482624, 208422380089, 404567235136, 735091890625, 1265319018496, 2081951752609, 3297303959104, 5053913144281

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 (7, -21, 35, -35, 21, -7, 1).

Programs

Magma

[(9*n+5)^6: n in [0..25]]; // Vincenzo Librandi, Jul 24 2011

Formula

G.f.: -(15625 + 7420161*x + 95657262*x^2 + 195063982*x^3 + 79678257*x^4 + 4798137*x^5 + 4096*x^6) /(x-1)^7. - R. J. Mathar, Mar 20 2018