A017175 a(n) = (9*n + 1)^3.

1, 1000, 6859, 21952, 50653, 97336, 166375, 262144, 389017, 551368, 753571, 1000000, 1295029, 1643032, 2048383, 2515456, 3048625, 3652264, 4330747, 5088448, 5929741, 6859000, 7880599, 8998912

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).

Formula

G.f.: ( 1 + 996*x + 2865*x^2 + 512*x^3 ) / (x-1)^4. - R. J. Mathar, Jul 14 2016

Mathematica

(9 Range[0, 30] + 1)^3 (* Wesley Ivan Hurt, Jan 01 2024 *)

Prog

(Magma) [(9*n+1)^3: n in [0..40]]; // Vincenzo Librandi, Aug 30 2011

Crossrefs

Sequence in context: A043491 A100988 A195163 * A019548 A017271 A017511

Adjacent sequences: A017172 A017173 A017174 * A017176 A017177 A017178

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved