A033657 Trajectory of 23 under map x->x + (x-with-digits-reversed).

23, 55, 110, 121, 242, 484, 968, 1837, 9218, 17347, 91718, 173437, 907808, 1716517, 8872688, 17735476, 85189247, 159487405, 664272356, 1317544822, 3602001953, 7193004016, 13297007933, 47267087164

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base

Links

• Index entries for sequences related to Reverse and Add!

Crossrefs

Cf. A033650, A033655.

Formula

a(n) = A033655(n-1) = A033650(n+1), n>1. - R. J. Mathar, Oct 22 2008