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%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_.