1,1

Trajectory of n under map k -> A111273(k) is periodic with period length 2.

n = A111273(A111273(n)) and n <> A111273(n).

Apparently A111273 has infinitely many 2-cycles.

Table of n, a(n) for n=1..47.

A111273(122) = 183 and A111273(183) = 122, hence 122 and 183 are in the

sequence.

Cf. A111273, A113659, A113701.

Sequence in context: A208204 A067092 A041133 * A065646 A268251 A090508

Adjacent sequences: A113697 A113698 A113699 * A113701 A113702 A113703

nonn

Klaus Brockhaus, Nov 08 2005

approved