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A037588 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 3,1. 0
3, 28, 255, 2296, 20667, 186004, 1674039, 15066352, 135597171, 1220374540, 10983370863, 98850337768, 889653039915, 8006877359236, 72061896233127, 648557066098144, 5837013594883299 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

Index entries for linear recurrences with constant coefficients, signature (9,1,-9).

FORMULA

G.f.: x*(3+x) / ( (x-1)*(9*x-1)*(1+x) ). - R. J. Mathar, Apr 27 2015

a(n) = 7*9^n/20 -1/4 +(-1)^(n+1)/10. - R. J. Mathar, Apr 27 2015

MATHEMATICA

With[{c=PadLeft[{}, 20, {3, 1}]}, Table[FromDigits[Take[c, n], 9], {n, 20}]] (* Harvey P. Dale, Oct 15 2011 *)

CROSSREFS

Sequence in context: A037777 A037665 A037784 * A307885 A076723 A198887

Adjacent sequences:  A037585 A037586 A037587 * A037589 A037590 A037591

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 15 23:54 EDT 2019. Contains 328038 sequences. (Running on oeis4.)