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A122109 a(0)=1, a(1)=2, a(2)=6, a(n)=9*a(n-2)-4*a(n-3) for n>2. 0
1, 2, 6, 14, 46, 102, 358, 734, 2814, 5174, 22390, 35310, 180814, 228230, 1486086, 1330814, 12461854, 6032982, 106833430, 4449422, 937368942, -387288922, 8418522790, -7235076066, 77315860798, -98789775754 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..25.

FORMULA

G.f.: (1+2*x-3*x^2)/(1-9*x^2+4*x^3)

CROSSREFS

Sequence in context: A151399 A299042 A152806 * A133155 A297708 A284701

Adjacent sequences:  A122106 A122107 A122108 * A122110 A122111 A122112

KEYWORD

sign

AUTHOR

Philippe Deléham, Oct 18 2006

STATUS

approved

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Last modified January 23 03:08 EST 2019. Contains 319370 sequences. (Running on oeis4.)