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A037520 Base 3 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,0. 0
2, 7, 21, 65, 196, 588, 1766, 5299, 15897, 47693, 143080, 429240, 1287722, 3863167, 11589501, 34768505, 104305516, 312916548, 938749646, 2816248939, 8448746817, 25346240453, 76038721360, 228116164080, 684348492242 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..25.

Index entries for linear recurrences with constant coefficients, signature (3,0,1,-3)

FORMULA

G.f. x*(2+x) / ( (x-1)*(3*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

MATHEMATICA

With[{c=PadRight[{}, 27, {2, 1, 0}]}, Table[FromDigits[Take[c, n], 3], {n, 25}]] (* Harvey P. Dale, Nov 08 2011 *)

CROSSREFS

Sequence in context: A159972 A106271 A027990 * A218836 A331722 A052911

Adjacent sequences:  A037517 A037518 A037519 * A037521 A037522 A037523

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 21 20:46 EST 2020. Contains 332111 sequences. (Running on oeis4.)