A037648 Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,1.

3, 18, 109, 657, 3942, 23653, 141921, 851526, 5109157, 30654945, 183929670, 1103578021, 6621468129, 39728808774, 238372852645, 1430237115873, 8581422695238, 51488536171429, 308931217028577, 1853587302171462

Offset

1,1

Links

Table of n, a(n) for n=1..20.

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

Formula

G.f.: x*(3+x^2) / ( (x-1)*(6*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

Crossrefs

Sequence in context: A132900 A050623 A037760 * A036724 A037767 A037655

Adjacent sequences: A037645 A037646 A037647 * A037649 A037650 A037651

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved