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A015587
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Expansion of x/(1 - 9*x - 11*x^2).
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2
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0, 1, 9, 92, 927, 9355, 94392, 952433, 9610209, 96968644, 978430095, 9872525939, 99615464496, 1005136965793, 10142002801593, 102334531838060, 1032572817360063, 10418835206459227, 105127817849093736, 1060757547912895121, 10703223927556087185, 107997348375046630996
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OFFSET
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0,3
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COMMENTS
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Pisano period lengths: 1, 3, 4, 6, 20, 12, 48, 6, 12, 60, 5, 12,168, 48, 20, 12,288, 12, 6, 60,... - R. J. Mathar, Aug 10 2012
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LINKS
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FORMULA
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a(n) = 9*a(n-1) + 11*a(n-2).
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MATHEMATICA
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PROG
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(Sage) [lucas_number1(n, 9, -11) for n in range(0, 19)] # Zerinvary Lajos, Apr 26 2009
(Magma) [n le 2 select n-1 else 9*Self(n-1) + 11*Self(n-2): n in [1..30]]; // Vincenzo Librandi, Nov 15 2012
(PARI) x='x+O('x^30); concat([0], Vec(x/(1-9*x-11*x^2))) \\ G. C. Greubel, Jan 06 2018
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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