A037770 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,2,1.

3, 27, 245, 2206, 19857, 178713, 1608419, 14475772, 130281951, 1172537559, 10552838033, 94975542298, 854779880685, 7693018926165, 69237170335487, 623134533019384, 5608210797174459

Offset

1,1

Links

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

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

Formula

G.f.: x*(3+2*x^2+x^3) / ( (x-1)*(9*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, May 02 2015

Crossrefs

Sequence in context: A168495 A037763 A037651 * A037658 A370271 A163474

Adjacent sequences: A037767 A037768 A037769 * A037771 A037772 A037773

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved