1,1

Terms a(9) to a(29) are 205796147 (conjectured), 4402, 16720, 1089448, 442, 537, unknown, 1050177, 1575, 28822, unknown, 40573, 1066, 1587, unknown, unknown, 1081, 1082, 1085, 1115, 4185.

a(n) >= A092210(n); a(n) = A092210(n) iff the trajectory of A092210(n) is palindrome-free, i.e. A092210(n) is also a term of A075252.

a(n) determines a 1-1-mapping from the terms of A092210 to the terms of A075252, the inverse of the mapping determined by A092211.

The 1-1 property of the mapping depends on the conjecture that the base 2 Reverse and Add! trajectory of each term of A092210 contains only a finite number of palindromes (cf. A092215).

Base 2 analogue of A089494 (base 10) and A091677 (base 4).

Index entries for sequences related to Reverse and Add!

A092210(3) = 64, the trajectory of 64 joins the trajectory of 77 = A075252(2) at 48480, so a(3) = 77. A092210(5) = 98, the trajectory of 98 joins the trajectory of 3599 = A075252(16) at 401104704, so a(5) = 3599.

Cf. A075252, A092210, A092211, A092215, A089494, A091677.

Sequence in context: A127486 A078398 A060619 this_sequence A013770 A145323 A013816

Adjacent sequences: A092209 A092210 A092211 this_sequence A092213 A092214 A092215

nonn,base,more

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Feb 25 2004