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

8, 144, 4807526976, 5972304273877744135569338397692020533504

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Nov 19 2010

Keywords

• nonn

Comments

The next term has 161 digits.

Examples

			f(12)=144=2^4*3^2,
f(48)=4807526976=2^6*3^2*7*23*47*1103,
f(192)=2^8*3^2*7*23*47*769*1087*1103*2207*..,
f(768)=2^10*3^2*7*23*47*127*383*..,..
		

Crossrefs

Cf. A000045, A172145

Programs

Mathematica

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