A037764 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1,2.

3, 30, 301, 3012, 30123, 301230, 3012301, 30123012, 301230123, 3012301230, 30123012301, 301230123012, 3012301230123, 30123012301230, 301230123012301, 3012301230123012

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

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

Mathematica

Table[FromDigits[PadRight[{}, n, {3, 0, 1, 2}]], {n, 20}] (* Harvey P. Dale, Dec 07 2015 *)

Prog

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

Crossrefs

Sequence in context: A093138 A361896 A073557 * A037652 A037771 A037659

Adjacent sequences: A037761 A037762 A037763 * A037765 A037766 A037767

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved