A037796 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,1,0.

3, 23, 162, 1134, 7941, 55589, 389124, 2723868, 19067079, 133469555, 934286886, 6540008202, 45780057417, 320460401921, 2243222813448, 15702559694136, 109917917858955, 769425425012687, 5385977975088810

Offset

1,1

Links

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

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

Formula

a(n) = 7*a(n-1) + a(n-4) - 7*a(n-5).

G.f.: x*(3+2*x+x^2) / ( (x-1)*(7*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, Apr 30 2015

Crossrefs

Sequence in context: A164536 A037789 A037670 * A331723 A212395 A027141

Adjacent sequences: A037793 A037794 A037795 * A037797 A037798 A037799

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved