A017201 a(n) = (9*n + 3)^5.

243, 248832, 4084101, 24300000, 90224199, 254803968, 601692057, 1252332576, 2373046875, 4182119424, 6956883693, 11040808032, 16850581551, 24883200000, 35723051649, 50049003168, 68641485507

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1).

Formula

G.f.: 243*(1 + 1018*x + 10678*x^2 + 14498*x^3 + 2933*x^4 + 32*x^5)/(x-1)^6. - R. J. Mathar, Jul 14 2016

Mathematica

(9*Range[0, 20]+3)^5 (* or *) LinearRecurrence[{6, -15, 20, -15, 6, -1}, {243, 248832, 4084101, 24300000, 90224199, 254803968}, 20] (* Harvey P. Dale, Jul 27 2019 *)

Prog

(Magma) [(9*n+3)^5: n in [0..30]]; // Vincenzo Librandi, Jul 23 2011

Crossrefs

Sequence in context: A184691 A017021 A017105 * A017309 A017429 A017561

Adjacent sequences: A017198 A017199 A017200 * A017202 A017203 A017204

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved