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A166472 2^F(n+2)*3^F(n+1)/12, where F(n) is the n-th Fibonacci number (A000045(n)). 1

%I #7 Jul 12 2021 18:04:15

%S 1,6,72,5184,4478976,278628139008,14975624970497949696,

%T 50071566192138943522512952098816,

%U 8998235963747242817865410245394871488270255869919232

%N 2^F(n+2)*3^F(n+1)/12, where F(n) is the n-th Fibonacci number (A000045(n)).

%C For m>1, A166469(A002110(m)*a(n))=F(m+n+1).

%C A166469(a(n))=F(n+3)-2=A001911(n).

%F a(n)=A166470(n+1)/12.

%F For n>1, a(n)=12*a(n-1)*a(n-2).

%t Table[(2^Fibonacci[n + 2] * 3^Fibonacci[n + 1])/12, {n, 1, 10}] (* _G. C. Greubel_, May 15 2016 *)

%t (3^#[[1]] 2^#[[2]])/12&/@Partition[Fibonacci[Range[2,15]],2,1] (* _Harvey P. Dale_, Jul 12 2021 *)

%Y Subsequence of A003586, A025487.

%K nonn

%O 1,2

%A _Matthew Vandermast_, Nov 05 2009

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Last modified April 16 12:52 EDT 2024. Contains 371711 sequences. (Running on oeis4.)