OFFSET
1,2
EXAMPLE
0^(1^2)=0^1=0=a(1).
3^(2^2)=3^4=81=a(2).
5^(2^3)=5^8=390625=a(3).
7^(2^3)=7^8=5764801=a(4).
3^(2^2)=3^4=81=a(5), etc.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 01 2008
EXTENSIONS
One more term from R. J. Mathar, Apr 18 2010
STATUS
approved