A119413 16*n-12.

4, 20, 36, 52, 68, 84, 100, 116, 132, 148, 164, 180, 196, 212, 228, 244, 260, 276, 292, 308, 324, 340, 356, 372, 388, 404, 420, 436, 452, 468, 484, 500, 516, 532, 548, 564, 580, 596, 612, 628, 644, 660, 676, 692, 708, 724, 740, 756, 772, 788, 804, 820, 836

Offset

1,1

Comments

General form: (q*n+1)*q: q=2: A016825, q=3: A017197, q=4: A119413, ... . - Vladimir Joseph Stephan Orlovsky, Feb 16 2009

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (2,-1).

Formula

O.g.f.: 4*x*(1+3*x)/(1-x)^2. - R. J. Mathar, Aug 08 2008

Mathematica

Range[4, 1000, 16] (* Vladimir Joseph Stephan Orlovsky, May 31 2011 *)

Prog

(PARI) for(x=1, 100, print1(16*x-12, ", "))
(Magma) [16*n-12: n in [1..60]]; // Vincenzo Librandi, Jul 23 2011

Crossrefs

Cf. A085805, A044446.

Sequence in context: A030002 A238764 A085805 * A044446 A232221 A323183

Adjacent sequences: A119410 A119411 A119412 * A119414 A119415 A119416

Keyword

nonn,less,easy

Author

Jorge Coveiro, Jul 26 2006

Status

approved