A037708 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3,0,2.

1, 13, 130, 1302, 13021, 130213, 1302130, 13021302, 130213021, 1302130213, 13021302130, 130213021302, 1302130213021, 13021302130213, 130213021302130, 1302130213021302

Offset

1,2

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

Mathematica

Table[FromDigits[PadRight[{}, n, {1, 3, 0, 2}]], {n, 20}] (* or *) LinearRecurrence[ {10, 0, 0, 1, -10}, {1, 13, 130, 1302, 13021}, 20] (* Harvey P. Dale, Apr 23 2020 *)

Crossrefs

Sequence in context: A121033 A006100 A037603 * A142740 A248919 A037582

Adjacent sequences: A037705 A037706 A037707 * A037709 A037710 A037711

Keyword

nonn,easy

Author

Clark Kimberling

Status

approved