A037668 Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0.

3, 17, 85, 428, 2142, 10710, 53553, 267767, 1338835, 6694178, 33470892, 167354460, 836772303, 4183861517, 20919307585, 104596537928, 522982689642, 2614913448210, 13074567241053, 65372836205267, 326864181026335

Offset

1,1

Links

Table of n, a(n) for n=1..21.

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

Formula

G.f.: x*(3+2*x) / ( (x-1)*(5*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

Mathematica

Module[{nn=30, t}, t=PadRight[{}, nn, {3, 2, 0}]; Table[FromDigits[Take[t, n], 5], {n, nn}]] (* Harvey P. Dale, Dec 18 2012 *)

Crossrefs

Sequence in context: A216681 A350456 A037787 * A119884 A143549 A037794

Adjacent sequences: A037665 A037666 A037667 * A037669 A037670 A037671

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved