A037736 - OEIS

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A037736

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 2,1,0,3.

2, 21, 210, 2103, 21032, 210321, 2103210, 21032103, 210321032, 2103210321, 21032103210, 210321032103, 2103210321032, 21032103210321, 210321032103210, 2103210321032103

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Index entries for linear recurrences with constant coefficients, signature (10,0,0,1,-10).

FORMULA

a(n) = 10*a(n-1) + a(n-4) - 10*a(n-5). G.f: x*(2+x+3*x^3) / ((x-1)*(10*x-1)*(1+x)*(1+x^2)). - R. J. Mathar, Oct 05 2009

PROG

(PARI) Vec(x*(2+x+3*x^3)/((x-1)*(10*x-1)*(1+x)*(1+x^2)) + O(x^25)) \\ Jinyuan Wang, Apr 14 2020

CROSSREFS

Sequence in context: A303500 A037527 A131584 * A328073 A329318 A037559

Adjacent sequences: A037733 A037734 A037735 * A037737 A037738 A037739

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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