A037751 Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1,0.

2, 11, 45, 180, 722, 2891, 11565, 46260, 185042, 740171, 2960685, 11842740, 47370962, 189483851, 757935405, 3031741620, 12126966482, 48507865931, 194031463725, 776125854900, 3104503419602, 12418013678411, 49672054713645

Offset

1,1

Links

Table of n, a(n) for n=1..23.

Index entries for linear recurrences with constant coefficients, signature (5,-5,5,-4).

Formula

G.f.: ( x*(2+x) ) / ( (x-1)*(4*x-1)*(x^2+1) ). - R. J. Mathar, Oct 15 2015

Crossrefs

Sequence in context: A257066 A209604 A120279 * A037639 A319428 A000176

Adjacent sequences: A037748 A037749 A037750 * A037752 A037753 A037754

Keyword

nonn,base

Author

Clark Kimberling

Status

approved