A037530 Base-5 digits are, in order, the first n terms of the periodic sequence with initial period 1,1,2.

1, 6, 32, 161, 806, 4032, 20161, 100806, 504032, 2520161, 12600806, 63004032, 315020161, 1575100806, 7875504032, 39377520161, 196887600806, 984438004032, 4922190020161, 24610950100806, 123054750504032, 615273752520161

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+x+2*x^2) / ( (x-1)*(5*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015

Mathematica

Table[FromDigits[PadRight[{}, n, {1, 1, 2}], 5], {n, 30}] (* or *) LinearRecurrence[ {5, 0, 1, -5}, {1, 6, 32, 161}, 30] (* Harvey P. Dale, Sep 25 2021 *)

Crossrefs

Sequence in context: A292044 A006668 A232494 * A083320 A097139 A034942

Adjacent sequences: A037527 A037528 A037529 * A037531 A037532 A037533

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved