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A017126 a(n) = (8*n + 5)^2. 1
25, 169, 441, 841, 1369, 2025, 2809, 3721, 4761, 5929, 7225, 8649, 10201, 11881, 13689, 15625, 17689, 19881, 22201, 24649, 27225, 29929, 32761, 35721, 38809, 42025, 45369, 48841, 52441, 56169 (list; graph; refs; listen; history; text; internal format)
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.: ( -25 - 94*x - 9*x^2 ) / ( (x-1)^3 ). - R. J. Mathar, May 08 2015

MATHEMATICA

(8Range[0, 40]+5)^2  (* Harvey P. Dale, Mar 12 2011 *)

PROG

(MAGMA) [(8*n+5)^2: n in [0..35] ]; // Vincenzo Librandi, Jul 21 2011

(PARI) a(n)=(8*n+5)^2 \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Sequence in context: A338892 A198436 A080109 * A007204 A120096 A115330

Adjacent sequences:  A017123 A017124 A017125 * A017127 A017128 A017129

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified May 18 19:58 EDT 2021. Contains 344002 sequences. (Running on oeis4.)