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A133577
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a(n) = a(n-1) + 10*a(n-2) for n >= 2, a(0)=1, a(1)=2.
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4
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1, 2, 12, 32, 152, 472, 1992, 6712, 26632, 93752, 360072, 1297592, 4898312, 17874232, 66857352, 245599672, 914173192, 3370169912, 12511901832, 46213600952, 171332619272, 633468628792, 2346794821512, 8681481109432
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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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G.f.: (1+x)/(1-x-10*x^2).
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MATHEMATICA
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LinearRecurrence[{1, 10}, {1, 2}, 24] (* or *)
CoefficientList[Series[(1 + x)/(1 - x - 10 x^2), {x, 0, 23}], x] (* Michael De Vlieger, Jul 20 2017 *)
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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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