OFFSET
0,1
COMMENTS
This sequence relates to the question whether A327969(128) has a positive integer value, or whether it is -1 by the escape clause.
Note that when iterating the map k -> k' from A276086(A369638(4)) = A276086(15232) = 3299611946113357875 onward, the maximal exponent in the prime factorization (A051903) keeps on decreasing until it reaches 1 at the fifth iteration, and then stays as 1 for three more iterations (with k then 38863666759992439 = 643*60441161368573), but then, alas, on the next iteration, k' = 60441161369216 = 2^7 * 472196573197.
EXAMPLE
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 04 2024
STATUS
approved