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A037568 Base 3 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,2. 0
2, 7, 23, 71, 214, 644, 1934, 5803, 17411, 52235, 156706, 470120, 1410362, 4231087, 12693263, 38079791, 114239374, 342718124, 1028154374, 3084463123, 9253389371, 27760168115, 83280504346, 249841513040, 749524539122 (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+2*x^2) / ( (x-1)*(3*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

CROSSREFS

Sequence in context: A210581 A037488 A129669 * A076656 A085387 A147970

Adjacent sequences:  A037565 A037566 A037567 * A037569 A037570 A037571

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 20 14:02 EST 2020. Contains 331094 sequences. (Running on oeis4.)