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A173734
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(10^n+62)/9 for n>0.
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1
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8, 18, 118, 1118, 11118, 111118, 1111118, 11111118, 111111118, 1111111118, 11111111118, 111111111118, 1111111111118, 11111111111118, 111111111111118, 1111111111111118, 11111111111111118, 111111111111111118
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..100
Index to sequences with linear recurrences with constant coefficients, signature (11,-10).
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FORMULA
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a(n) = a(n-1)+10^(n-1)= 10*a(n-1)-62 with n>0, a(0)=7.
G.f.: x*(8-70*x)/((1-x)*(1-10*x)). - Vincenzo Librandi, Jul 05 2012
a(n) = 11*a(n-1) -10*a(n-2). - Vincenzo Librandi, Jul 05 2012
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MATHEMATICA
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CoefficientList[Series[(8-70*x)/((1-x)*(1-10*x)), {x, 0, 30}], x] (* Vincenzo Librandi, Jul 05 2012 *)
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PROG
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(MAGMA) [(10^n+62)/9: n in [1..20]]; // Vincenzo Librandi, Jul 05 2012
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CROSSREFS
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Sequence in context: A036747 A151351 A113563 * A219524 A215174 A171371
Adjacent sequences: A173731 A173732 A173733 * A173735 A173736 A173737
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Feb 23 2010
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STATUS
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approved
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