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A093133
Third binomial transform of Fib(3n-3) divided by 2.
0
1, 3, 10, 40, 200, 1200, 8000, 56000, 400000, 2880000, 20800000, 150400000, 1088000000, 7872000000, 56960000000, 412160000000, 2982400000000, 21580800000000, 156160000000000, 1129984000000000, 8176640000000000
OFFSET
0,2
COMMENTS
2*a(n)/2^n is the 2nd binomial transform of Fib(n-3).
FORMULA
G.f.: (1-7x)/(1-10x+20x^2); a(n)=(1/2-sqrt(5)/5)(5+sqrt(5))^n+(1/2+sqrt(5)/5)(5-sqrt(5))^n.
MATHEMATICA
CoefficientList[Series[(1-7x)/(1-10x+20x^2), {x, 0, 20}], x] (* Harvey P. Dale, Mar 24 2011 *)
CROSSREFS
Cf. A000045.
Sequence in context: A231531 A136128 A089902 * A030817 A030845 A030868
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 23 2004
STATUS
approved