A037673 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,2,0.

3, 32, 320, 3203, 32032, 320320, 3203203, 32032032, 320320320, 3203203203, 32032032032, 320320320320, 3203203203203, 32032032032032, 320320320320320, 3203203203203203

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

Prog

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

Crossrefs

Sequence in context: A278303 A029502 A037792 * A037799 A091706 A091705

Adjacent sequences: A037670 A037671 A037672 * A037674 A037675 A037676

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved