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A135628
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Multiples of 28.
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10
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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
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 28*n.
G.f.: (28*x)/(1 - x)^2.
E.g.f.: 28*x*exp(x).
a(n) = 2*a(n-1) - a(n-2). (End)
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EXAMPLE
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a(9) = 28*9 = 252.
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MATHEMATICA
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LinearRecurrence[{2, -1}, {0, 28}, 25] (* G. C. Greubel, Oct 24 2016 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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