A037731 Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,0,3.

2, 11, 55, 278, 1392, 6961, 34805, 174028, 870142, 4350711, 21753555, 108767778, 543838892, 2719194461, 13595972305, 67979861528, 339899307642, 1699496538211, 8497482691055, 42487413455278, 212437067276392, 1062185336381961

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Index entries for linear recurrences with constant coefficients, signature (5,0,0,1,-5).

Formula

G.f.: ( x*(2+x+3*x^3) ) / ( (x-1)*(5*x-1)*(1+x)*(1+x^2) ). - R. J. Mathar, Oct 14 2015

Mathematica

Table[FromDigits[PadRight[{}, n, {2, 1, 0, 3}], 5], {n, 30}] (* or  *) LinearRecurrence[ {5, 0, 0, 1, -5}, {2, 11, 55, 278, 1392}, 30] (* Harvey P. Dale, Sep 11 2019 *)

Crossrefs

Sequence in context: A327215 A307444 A037522 * A221019 A371439 A115205

Adjacent sequences: A037728 A037729 A037730 * A037732 A037733 A037734

Keyword

nonn,base

Author

Clark Kimberling

Status

approved