Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #14 Jul 10 2020 18:27:08
%S 31,44,88,176,847,1595,7546,14003,44044,88088,176176,847847,1596595,
%T 7553546,14007103,44177144,88354288,176599676,853595347,1597190705,
%U 6668108656,13236127322,35608290553,71117571206
%N Trajectory of 31 under map x->x + (x-with-digits-reversed).
%H <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a>
%F a(n) = A033654(n-1) = A033652(n+1), n>1. [From _R. J. Mathar_, Oct 22 2008]
%t NestList[#+IntegerReverse[#]&,31,30] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Nov 23 2016 *)
%K nonn,base
%O 0,1
%A _N. J. A. Sloane_.