OFFSET
1,1
COMMENTS
Note the terms 3^1=3, 3^2=9, 3^3=27, 3^5=243, 3^7=2187, and 3^13=1594323. The other listed terms are prime.
Next term > 2^2000. [From Max Alekseyev]
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Dino Lorenzini (lorenzin(AT)uga.edu), Jan 25 2010
EXTENSIONS
Edited and missing terms 3, 5, 9, 17 added by Max Alekseyev, Feb 16 2011
STATUS
approved