A037652 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1.

3, 30, 301, 3013, 30130, 301301, 3013013, 30130130, 301301301, 3013013013, 30130130130, 301301301301, 3013013013013, 30130130130130, 301301301301301, 3013013013013013

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

Prog

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

Crossrefs

Sequence in context: A361896 A073557 A037764 * A037771 A037659 A131586

Adjacent sequences: A037649 A037650 A037651 * A037653 A037654 A037655

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved