A139436(a(n)) = 1.
Conjecture: the sequence is finite and a(13)=41 is the largest term.
Table of n, a(n) for n=1..13.
Sequence in context: A283965 A193599 A068125 * A233746 A299233 A320997
Adjacent sequences: A139434 A139435 A139436 * A139438 A139439 A139440
Reinhard Zumkeller, Apr 21 2008