A017426 a(n) = (11*n + 3)^2.

9, 196, 625, 1296, 2209, 3364, 4761, 6400, 8281, 10404, 12769, 15376, 18225, 21316, 24649, 28224, 32041, 36100, 40401, 44944, 49729, 54756, 60025, 65536, 71289, 77284, 83521, 90000, 96721, 103684, 110889, 118336, 126025, 133956, 142129, 150544, 159201, 168100, 177241

Offset

0,1

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

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

Formula

a(0)=9, a(1)=196, a(2)=625, a(n)=3*a(n-1)-3*a(n-2)+a(n-3). - Harvey P. Dale, Nov 02 2013

Mathematica

(11Range[0, 30]+3)^2 (* or *) LinearRecurrence[{3, -3, 1}, {9, 196, 625}, 30] (* Harvey P. Dale, Nov 02 2013 *)

Prog

(PARI) a(n)=(11*n+3)^2 \\ Charles R Greathouse IV, Jun 17 2017

Crossrefs

Sequence in context: A334777 A081020 A358740 * A244506 A274269 A250401

Adjacent sequences: A017423 A017424 A017425 * A017427 A017428 A017429

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved