A037546 Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.

1, 7, 37, 186, 932, 4662, 23311, 116557, 582787, 2913936, 14569682, 72848412, 364242061, 1821210307, 9106051537, 45530257686, 227651288432, 1138256442162, 5691282210811, 28456411054057, 142282055270287, 711410276351436

Offset

1,2

Links

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

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

Formula

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

Mathematica

Table[FromDigits[PadRight[{}, n, {1, 2, 2}], 5], {n, 30}] (* or *) LinearRecurrence[ {5, 0, 1, -5}, {1, 7, 37, 186}, 30] (* Harvey P. Dale, May 08 2021 *)

Crossrefs

Sequence in context: A356338 A117424 A192811 * A226867 A140476 A057651

Adjacent sequences: A037543 A037544 A037545 * A037547 A037548 A037549

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved