A139437 Numbers having exactly one partition into initial terms of a Collatz trajectory starting with a value less than n.

3, 5, 6, 8, 10, 11, 16, 17, 20, 23, 25, 32, 41

Offset

1,1

Comments

A139436(a(n)) = 1.

Conjecture: the sequence is finite and a(13)=41 is the largest term.

Links

Table of n, a(n) for n=1..13.

Crossrefs

Sequence in context: A283965 A193599 A068125 * A233746 A299233 A320997

Adjacent sequences: A139434 A139435 A139436 * A139438 A139439 A139440

Keyword

nonn,fini,full

Author

Reinhard Zumkeller, Apr 21 2008

Status

approved