A037621 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,3.

2, 14, 101, 709, 4963, 34744, 243210, 1702470, 11917293, 83421053, 583947371, 4087631600, 28613421202, 200293948414, 1402057638901, 9814403472309, 68700824306163, 480905770143144, 3366340391002010

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (7,0,1,-7).

Formula

G.f.: x*(2+3*x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 29 2015

Crossrefs

Sequence in context: A185010 A144277 A037726 * A085372 A123525 A286310

Adjacent sequences: A037618 A037619 A037620 * A037622 A037623 A037624

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved