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Search: id:A015601
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| A015601 |
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a(n) = 11 a(n-1) + 7 a(n-2). |
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+0
1
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| 0, 1, 11, 128, 1485, 17231, 199936, 2319913, 26918595, 312343936, 3624213461, 42052755623, 487949806080, 5661817156241, 65695637361211, 762284731067008, 8845001503265565, 102631009653390271
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n)=-(1/149)*[11/2-(1/2)*sqrt(149)]^n*sqrt(149)+(1/149)*[11/2+(1/2)*sqrt(149)]^n*sqrt(149), with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jul 09 2008
G.f.:1/(1-11*x-7*x^2) . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 27 2009]
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PROGRAM
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(Other) sage: [lucas_number1(n, 11, -7) for n in xrange(0, 18)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 27 2009]
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CROSSREFS
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Sequence in context: A084975 A065543 A015598 this_sequence A024144 A015602 A015603
Adjacent sequences: A015598 A015599 A015600 this_sequence A015602 A015603 A015604
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KEYWORD
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nonn,easy
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AUTHOR
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Olivier Gerard (olivier.gerard(AT)gmail.com)
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