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A037602 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,0. 0
1, 12, 108, 973, 8760, 78840, 709561, 6386052, 57474468, 517270213, 4655431920, 41898887280, 377089985521, 3393809869692, 30544288827228, 274898599445053, 2474087395005480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (9,0,1,-9).

Index entries for 3-automatic sequences.

FORMULA

G.f.: x*(1+3*x) / ( (x-1)*(9*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015

A007095(a(n)) = A037603(n). - R. J. Mathar, Apr 27 2015

PROG

(PARI) a(n)=([0, 1, 0, 0; 0, 0, 1, 0; 0, 0, 0, 1; -9, 1, 0, 9]^(n-1)*[1; 12; 108; 973])[1, 1] \\ Charles R Greathouse IV, Feb 13 2017

CROSSREFS

Sequence in context: A111990 A053469 A055533 * A037707 A140317 A069653

Adjacent sequences:  A037599 A037600 A037601 * A037603 A037604 A037605

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 20 15:43 EDT 2019. Contains 321345 sequences. (Running on oeis4.)