A135628 Multiples of 28.

0, 28, 56, 84, 112, 140, 168, 196, 224, 252, 280, 308, 336, 364, 392, 420, 448, 476, 504, 532, 560, 588, 616, 644, 672, 700, 728, 756, 784, 812, 840, 868, 896, 924, 952, 980, 1008, 1036, 1064, 1092, 1120, 1148, 1176, 1204, 1232, 1260, 1288, 1316, 1344, 1372

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..1000

Luis Manuel Rivera, Integer sequences and k-commuting permutations, arXiv preprint arXiv:1406.3081 [math.CO], 2014.

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

Formula

a(n) = 28*n.

From G. C. Greubel, Oct 24 2016: (Start)

G.f.: (28*x)/(1 - x)^2.

E.g.f.: 28*x*exp(x).

a(n) = 2*a(n-1) - a(n-2). (End)

Example

a(9) = 28*9 = 252.

Mathematica

Range[0, 3000, 28] (* Vladimir Joseph Stephan Orlovsky, Jun 03 2011 *)
LinearRecurrence[{2, -1}, {0, 28}, 25] (* G. C. Greubel, Oct 24 2016 *)

Crossrefs

Cf. A008588, A008596, A127777.

Sequence in context: A079731 A119168 A040756 * A204646 A211491 A270297

Adjacent sequences: A135625 A135626 A135627 * A135629 A135630 A135631

Keyword

easy,nonn

Author

Omar E. Pol, Nov 25 2007

Status

approved