A037536 - OEIS

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A037536

Base-3 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,1.

0

1, 5, 16, 49, 149, 448, 1345, 4037, 12112, 36337, 109013, 327040, 981121, 2943365, 8830096, 26490289, 79470869, 238412608, 715237825, 2145713477, 6437140432, 19311421297, 57934263893, 173802791680, 521408375041

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OFFSET

1,2

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*(1+x)^2 / ( (x-1)*(3*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 29 2015

CROSSREFS

Sequence in context: A180129 A244410 A052909 * A192904 A082001 A084356

Adjacent sequences: A037533 A037534 A037535 * A037537 A037538 A037539

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved