A017306 a(n) = (10*n + 3)^2.

9, 169, 529, 1089, 1849, 2809, 3969, 5329, 6889, 8649, 10609, 12769, 15129, 17689, 20449, 23409, 26569, 29929, 33489, 37249, 41209, 45369, 49729, 54289, 59049, 64009, 69169, 74529, 80089, 85849

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.: -(9 + 142*x + 49*x^2)/(x-1)^3. - R. J. Mathar, Mar 20 2018

Prog

(Magma) [(10*n+3)^2: n in [0..35]]; // Vincenzo Librandi, Jul 31 2011
(PARI) a(n)=(10*n+3)^2 \\ Charles R Greathouse IV, Jun 17 2017

Crossrefs

Sequence in context: A132874 A223289 A281996 * A210089 A243949 A202836

Adjacent sequences: A017303 A017304 A017305 * A017307 A017308 A017309

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved