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A171553
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a(n) = 1+9*10^n+100^n.
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4
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11, 191, 10901, 1009001, 100090001, 10000900001, 1000009000001, 100000090000001, 10000000900000001, 1000000009000000001, 100000000090000000001, 10000000000900000000001, 1000000000009000000000001, 100000000000090000000000001, 10000000000000900000000000001
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: -(1910*x^2-1030*x+11) / ((x-1)*(10*x-1)*(100*x-1)). - Colin Barker, Jul 29 2014
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MATHEMATICA
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Join[{11}, Table[FromDigits[Join[{1}, PadRight[{}, n, 0], {9}, PadRight[{}, n, 0], {1}]], {n, 0, 20}]] (* Harvey P. Dale, Apr 26 2013 *)
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PROG
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(PARI) Vec(-(1910*x^2-1030*x+11)/((x-1)*(10*x-1)*(100*x-1)) + O(x^100)) \\ Colin Barker, Jul 29 2014
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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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EXTENSIONS
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STATUS
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approved
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