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A017006 a(n) = (7*n+2)^2. 1
4, 81, 256, 529, 900, 1369, 1936, 2601, 3364, 4225, 5184, 6241, 7396, 8649, 10000, 11449, 12996, 14641, 16384, 18225, 20164, 22201, 24336, 26569, 28900, 31329, 33856, 36481, 39204, 42025, 44944, 47961 (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.: ( -4-69*x-25*x^2 ) / (x-1)^3 . - R. J. Mathar, Mar 21 2016

PROG

(MAGMA) [(7*n+2)^2: n in [0..40]]; // Vincenzo Librandi, Jul 13 2011

(PARI) a(n) = (7*n+2)^2; \\ Altug Alkan, Mar 21 2016

CROSSREFS

Sequence in context: A072363 A272884 A053901 * A041189 A123198 A202831

Adjacent sequences:  A017003 A017004 A017005 * A017007 A017008 A017009

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified July 12 18:03 EDT 2020. Contains 335666 sequences. (Running on oeis4.)