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A037618
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Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,3.
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0
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2, 8, 35, 142, 568, 2275, 9102, 36408, 145635, 582542, 2330168, 9320675, 37282702, 149130808, 596523235, 2386092942, 9544371768, 38177487075, 152709948302, 610839793208, 2443359172835, 9773436691342, 39093746765368
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OFFSET
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1,1
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LINKS
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FORMULA
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G.f.: x*(2+3*x^2) / ( (x-1)*(4*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; -4, 1, 0, 4]^(n-1)*[2; 8; 35; 142])[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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