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

15625, 7529536, 148035889, 1073741824, 4750104241, 15625000000, 42180533641, 98867482624, 208422380089, 404567235136, 735091890625, 1265319018496, 2081951752609, 3297303959104, 5053913144281, 7529536000000, 10942526586601, 15557597153344, 21691961596369, 29721861554176

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.: -(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

Mathematica

(9*Range[0, 20] + 5)^6 (* Paolo Xausa, Dec 12 2025 *)

Prog

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

Crossrefs

Sequence in context: A017046 A017130 A303155 * A223232 A017334 A265934

Adjacent sequences: A017223 A017224 A017225 * A017227 A017228 A017229

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved