A037659 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2.

3, 30, 302, 3023, 30230, 302302, 3023023, 30230230, 302302302, 3023023023, 30230230230, 302302302302, 3023023023023, 30230230230230, 302302302302302, 3023023023023023

Offset

1,1

Links

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

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

Formula

G.f.: x*(3+2*x^2) / ( (x-1)*(10*x-1)*(1+x+x^2) ). - R. J. Mathar, Aug 04 2013

Prog

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

Crossrefs

Sequence in context: A037764 A037652 A037771 * A131586 A163475 A200142

Adjacent sequences: A037656 A037657 A037658 * A037660 A037661 A037662

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved