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A172150
Smallest Fibonacci number divisible by 2^(2*n).
1
8, 144, 4807526976, 5972304273877744135569338397692020533504
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OFFSET
1,1
COMMENTS
The next term has 161 digits.
LINKS
Table of n, a(n) for n=1..4.
EXAMPLE
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*..,..
MATHEMATICA
lst={8}; k=12; Do[AppendTo[lst, Fibonacci[k]]; k*=4, {n, 5}]; lst
CROSSREFS
Cf.
A000045
,
A172145
Sequence in context:
A111687
A231851
A071305
*
A105046
A123812
A064331
Adjacent sequences:
A172147
A172148
A172149
*
A172151
A172152
A172153
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky
, Nov 19 2010
STATUS
approved
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Last modified March 28 03:28 EDT 2024. Contains 371235 sequences. (Running on oeis4.)