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A135628 Multiples of 28. 4
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 24 00:27 EST 2017. Contains 295164 sequences.