OFFSET
1,3
COMMENTS
Reinhard Zumkeller conjectures (at A102730) that this sequence is finite. I conjecture the contrary, that a(n) exists for every n. Further, I expect a(n) << n^n. [Charles R Greathouse IV, Aug 21 2011]
EXAMPLE
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Reinhard Zumkeller, Feb 12 2005
EXTENSIONS
a(11) and a(12) from D. S. McNeil, Aug 21 2011
STATUS
approved