OFFSET
0,1
COMMENTS
Conjecture 1: For each k > 0 the trajectory of k eventually leads to a term in the trajectory of some j which belongs to A075421, i.e., whose trajectory (presumably) never leads to a palindrome. Conjecture 2: There is no k > 0 such that the trajectory of k contains more than twelve palindromes, i.e., a(n) = -1 for n > 12.
Base-4 analog of A077594.
EXAMPLE
CROSSREFS
KEYWORD
base,sign
AUTHOR
Klaus Brockhaus, Jan 28 2004
STATUS
approved