OFFSET
1,1
COMMENTS
Conjecture: No term is zero.
EXAMPLE
a(10) = 130, f(10) = 10 + 1 = 11, f(f(10)) = f(11) = 13,... we get the sequence 10,11,13,17,25,32,37,47,58,71,79,95,109,119,130,...
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Dec 17 2004
EXTENSIONS
Extended by Ray Chandler, Dec 19 2004
STATUS
approved