A037775 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 3,1,0,2.

3, 22, 154, 1080, 7563, 52942, 370594, 2594160, 18159123, 127113862, 889797034, 6228579240, 43600054683, 305200382782, 2136402679474, 14954818756320, 104683731294243, 732786119059702, 5129502833417914

Offset

1,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (8,-8,8,-7).

Formula

a(n) = 8a(n-1) - 8a(n-2) + 8a(n-3) - 7a(n-4)

G.f.: x*(3-2*x+2*x^2) / ( (x-1)*(7*x-1)*(x^2+1) ). - R. J. Mathar, May 02 2015

Crossrefs

Sequence in context: A110469 A121723 A372199 * A037663 A091167 A037782

Adjacent sequences: A037772 A037773 A037774 * A037776 A037777 A037778

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved