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A015603
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a(n) = 11*a(n-1) + 9*a(n-2).
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2
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0, 1, 11, 130, 1529, 17989, 211640, 2489941, 29294111, 344644690, 4054738589, 47703926689, 561235840880, 6602929589881, 77683348056611, 913943194931650, 10752525276757649, 126503266798718989, 1488308662276727720, 17509924686232475821
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OFFSET
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0,3
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(Sage) [lucas_number1(n, 11, -9) for n in range(0, 18)] # Zerinvary Lajos, Apr 27 2009
(Magma) [n le 2 select n-1 else 11*Self(n-1) + 9*Self(n-2): n in [1..30]]; // Vincenzo Librandi, Nov 22 2012
(PARI) x='x+O('x^30); concat([0], Vec(x/(1-11*x-9*x^2))) \\ G. C. Greubel, Jan 16 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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EXTENSIONS
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STATUS
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approved
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