OFFSET
0,3
EXAMPLE
a(5)=4 as f(2^5)=3^3 < 2^5, f(3^3)=4^2 < 3^3, f(4^2)=5 < 4^2 and f(5)=6^0 < 5.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Naohiro Nomoto, Dec 29 2003
STATUS
approved