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A037612
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Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,2.
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0
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1, 8, 42, 211, 1058, 5292, 26461, 132308, 661542, 3307711, 16538558, 82692792, 413463961, 2067319808, 10336599042, 51682995211, 258414976058, 1292074880292, 6460374401461, 32301872007308, 161509360036542, 807546800182711
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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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G.f.: x*(1+x)*(2*x+1) / ( (x-1)*(5*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015
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PROG
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(PARI) a(n)=([0, 1, 0, 0; 0, 0, 1, 0; 0, 0, 0, 1; -5, 1, 0, 5]^(n-1)*[1; 8; 42; 211])[1, 1] \\ Charles R Greathouse IV, Feb 13 2017
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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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