A037515 Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,1.

2, 12, 73, 440, 2640, 15841, 95048, 570288, 3421729, 20530376, 123182256, 739093537, 4434561224, 26607367344, 159644204065, 957865224392, 5747191346352, 34483148078113, 206898888468680, 1241393330812080, 7448359984872481

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Index entries for linear recurrences with constant coefficients, signature (6,0,1,-6).

Formula

G.f.: x*(2+x^2) / ( (x-1)*(6*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

Crossrefs

Sequence in context: A002397 A163085 A328946 * A037718 A342054 A020049

Adjacent sequences: A037512 A037513 A037514 * A037516 A037517 A037518

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved