OFFSET
1,2
EXAMPLE
a(1)=2^0=1, a(2)=4^1=4, a(3)=6^3=216, a(4)=12^5=248832.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 14 2009
EXTENSIONS
More terms from R. J. Mathar, May 30 2010
STATUS
approved