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A172150 Smallest Fibonacci number divisible by 2^(2*n). 1

%I #7 Mar 30 2012 18:52:13

%S 8,144,4807526976,5972304273877744135569338397692020533504

%N Smallest Fibonacci number divisible by 2^(2*n).

%C The next term has 161 digits.

%e f(12)=144=2^4*3^2,

%e f(48)=4807526976=2^6*3^2*7*23*47*1103,

%e f(192)=2^8*3^2*7*23*47*769*1087*1103*2207*..,

%e f(768)=2^10*3^2*7*23*47*127*383*..,..

%t lst={8};k=12;Do[AppendTo[lst,Fibonacci[k]];k*=4,{n,5}];lst

%Y Cf. A000045, A172145

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Nov 19 2010

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Last modified May 27 11:42 EDT 2024. Contains 372858 sequences. (Running on oeis4.)