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A037771
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Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2,1.
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0
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3, 30, 302, 3021, 30213, 302130, 3021302, 30213021, 302130213, 3021302130, 30213021302, 302130213021, 3021302130213, 30213021302130, 302130213021302, 3021302130213021
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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*(3+2*x^2+x^3) / ( (x-1)*(10*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, Aug 04 2013
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PROG
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(PARI) Vec(x*(3+2*x^2+x^3)/((x-1)*(10*x-1)*(1+x)*(x^2+1)) + O(x^25)) \\ Jinyuan Wang, Apr 14 2020
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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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