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A033133
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Base-6 digits are, in order, the first n terms of the periodic sequence with initial period 1,1,0.
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1
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1, 7, 42, 253, 1519, 9114, 54685, 328111, 1968666, 11811997, 70871983, 425231898, 2551391389, 15308348335, 91850090010, 551100540061, 3306603240367, 19839619442202, 119037716653213, 714226299919279, 4285357799515674, 25712146797094045, 154272880782564271
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = 6*a(n-1) + a(n-3) - 6*a(n-4).
G.f.: x*(1+x) / ((1-x)*(1-6*x)*(1+x+x^2)). - Colin Barker, Dec 24 2015
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PROG
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(PARI) Vec(x*(1+x)/((1-x)*(1-6*x)*(1+x+x^2)) + O(x^30)) \\ Colin Barker, Dec 24 2015
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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