

A014337


Threefold exponential convolution of Fibonacci numbers with themselves (divided by 6).


3



0, 0, 0, 1, 6, 35, 180, 910, 4494, 22049, 107580, 523765, 2546280, 12370436, 60074196, 291677905, 1416019290, 6873991055, 33368325084, 161976597634, 786259649010, 3816607413905, 18526261416960
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OFFSET

0,5


LINKS



FORMULA

a(n) = (1/30)(3^n*Fibonacci(n)  3*Fibonacci(2n)).  Ralf Stephan, May 14 2004
G.f.: x^3/((13*x+x^2)*(13*x9*x^2)).  Colin Barker, Mar 19 2012


MATHEMATICA

CoefficientList[Series[x^3/((13*x+x^2)*(13*x9*x^2)), {x, 0, 30}], x] (* Vincenzo Librandi, Mar 20 2012 *)


PROG



CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



