OFFSET
1,3
COMMENTS
The sequence of the length of the iteration in the Collatz sequence is known as A006577, and the sequence of positive integers which do not appear in a Collatz sequence starting from a smaller positive integer is listed as A177729. This sequence is basically the combination of the two. Taking the sequence A177729 as input and then listing the length of the iteration for those (from A006577).
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Stikker, Aug 30 2018
STATUS
approved