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A010005 a(0) = 1, a(n) = 15*n^2 + 2 for n>0. 2
1, 17, 62, 137, 242, 377, 542, 737, 962, 1217, 1502, 1817, 2162, 2537, 2942, 3377, 3842, 4337, 4862, 5417, 6002, 6617, 7262, 7937, 8642, 9377, 10142, 10937, 11762, 12617, 13502, 14417, 15362, 16337, 17342, 18377, 19442, 20537, 21662, 22817, 24002, 25217, 26462 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Bruno Berselli, Table of n, a(n) for n = 0..1000

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

FORMULA

G.f.: (1+x)*(1+13*x+x^2)/(1-x)^3. - Bruno Berselli, Feb 06 2012

E.g.f.: (x*(x+1)*15+2)*e^x-1. - Gopinath A. R., Feb 14 2012

MATHEMATICA

Join[{1}, 15 Range[42]^2 + 2] (* Bruno Berselli, Feb 06 2012 *)

Join[{1}, LinearRecurrence[{3, -3, 1}, {17, 62, 137}, 50]] (* Vincenzo Librandi, Aug 03 2015 *)

PROG

(PARI) A010005(n)=15*n^2+2-!n   \\ M. F. Hasler, Feb 14 2012

(MAGMA) [1] cat [15*n^2+2: n in [1..50]]; // Vincenzo Librandi, Aug 03 2015

CROSSREFS

Cf. A206399.

Sequence in context: A211587 A226026 A195025 * A172076 A063522 A244973

Adjacent sequences:  A010002 A010003 A010004 * A010006 A010007 A010008

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Bruno Berselli, Feb 06 2012

STATUS

approved

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Last modified April 24 18:03 EDT 2019. Contains 322430 sequences. (Running on oeis4.)