A017150 a(n) = (8*n + 7)^2.

49, 225, 529, 961, 1521, 2209, 3025, 3969, 5041, 6241, 7569, 9025, 10609, 12321, 14161, 16129, 18225, 20449, 22801, 25281, 27889, 30625, 33489, 36481, 39601, 42849, 46225, 49729, 53361, 57121, 61009, 65025, 69169, 73441, 77841, 82369, 87025, 91809, 96721, 101761, 106929

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

Formula

G.f.: ( -49 - 78*x - x^2 ) / ( (x-1)^3 ). - R. J. Mathar, Aug 26 2015

Mathematica

(8*Range[0, 50] + 7)^2 (* Paolo Xausa, Dec 05 2025 *)
LinearRecurrence[{3, -3, 1}, {49, 225, 529}, 50] (* Harvey P. Dale, Jan 05 2026 *)

Prog

(Magma) [(8*n+7)^2: n in [0..35]]; // Vincenzo Librandi, Jul 22 2011
(PARI) a(n)=(8*n+7)^2 \\ Charles R Greathouse IV, Jun 17 2017

Crossrefs

Sequence in context: A204709 A192359 A100453 * A137880 A264538 A266799

Adjacent sequences: A017147 A017148 A017149 * A017151 A017152 A017153

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved