OFFSET
0,2
COMMENTS
2^n+1 divides 2^(2^n)-1 iff n is a power of 2.
MATHEMATICA
Table[ (2^2^2^n - 1) / (2^2^n + 1), {n, 0, 3} ]
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Apr 08 2007
STATUS
approved