A037623 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,3.

2, 18, 165, 1487, 13383, 120450, 1084052, 9756468, 87808215, 790273937, 7112465433, 64012188900, 576109700102, 5184987300918, 46664885708265, 419983971374387, 3779855742369483

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Index entries for linear recurrences with constant coefficients, signature (9,0,1,-9).

Formula

G.f.: x*(2+3*x^2) / ( (x-1)*(9*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 29 2015

Crossrefs

Sequence in context: A005260 A183250 A037728 * A052865 A052883 A052665

Adjacent sequences: A037620 A037621 A037622 * A037624 A037625 A037626

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved