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 A077594 Smallest number whose Reverse and Add! trajectory (presumably) contains exactly n palindromes, or -1 if there is no such number. 17
 196, 89, 49, 18, 9, 14, 7, 6, 3, 4, 2, 1, 10000, -1, -1, -1, -1, -1, -1, -1, -1 (list; graph; refs; listen; history; text; internal format)
 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 A063048, 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. LINKS EXAMPLE a(9) = 4 since the trajectory of 4 contains the nine palindromes 4, 8, 77, 1111, 2222, 4444, 8888, 661166, 3654563 and at 7309126 joins the trajectory of 10577 = A063048(6) and no m < 4 contains exactly nine palindromes. CROSSREFS Cf. A002113, A006960, A023108, A063048, A063433, A065001, A070742. Sequence in context: A084232 A145305 A174890 * A306359 A044870 A248021 Adjacent sequences:  A077591 A077592 A077593 * A077595 A077596 A077597 KEYWORD base,sign AUTHOR Klaus Brockhaus, Nov 08 2002 STATUS approved

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Last modified October 22 22:34 EDT 2019. Contains 328335 sequences. (Running on oeis4.)