OFFSET
1,1
COMMENTS
The name contains an unmatched parenthesis. - Editors, Mar 13 2024
EXAMPLE
a(n) = 2^2^n + 3 = 7 when n = 1. phi(phi(7)) = 2. 2^2^(1 + 2*k) + 3 = 259; 259/7 = 37.
PROG
(PARI) a(k)=(2^2^(1 + 2*k) + 3)/7
CROSSREFS
KEYWORD
nonn,uned,bref
AUTHOR
A.K. Devaraj, Dec 08 2009
STATUS
approved