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A016874 a(n) = (5*n + 2)^2. 1
4, 49, 144, 289, 484, 729, 1024, 1369, 1764, 2209, 2704, 3249, 3844, 4489, 5184, 5929, 6724, 7569, 8464, 9409, 10404, 11449, 12544, 13689, 14884, 16129, 17424, 18769, 20164, 21609, 23104, 24649, 26244 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

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

FORMULA

a(n) = a(n-1) + 50*n - 5; a(0)=4. - Vincenzo Librandi, Jun 07 2011

MATHEMATICA

(5*Range[0, 40]+2)^2  (* Harvey P. Dale, Feb 19 2011 *)

PROG

(MAGMA) [(5*n+2)^2: n in [0..40]]; // Vincenzo Librandi, Jun 07 2011

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

CROSSREFS

Sequence in context: A061100 A147803 A112533 * A092866 A041065 A166838

Adjacent sequences:  A016871 A016872 A016873 * A016875 A016876 A016877

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 21 00:13 EST 2019. Contains 329348 sequences. (Running on oeis4.)