This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A070791 #10 Oct 21 2019 02:34:30
%S A070791 5,10,11,13,17,20,22,26,31,35,40,44,53,62,71,79,80,88,97,115,142,158,
%T A070791 170,176,185,214,241,257,275,284,313,329,340,356,374,383,412,428,455,
%U A070791 469,473,482,511,527,554,568,572,581,599,610,626,649,653,667,671,680
%N A070791 Integers n such that the 'Reverse and Add!' trajectory of n joins the trajectory of 5.
%H A070791 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a>
%e A070791 The trajectory of 10 is part of the trajectory of 5; the trajectory of 340 joins the trajectory of 5 at 88088 after 7 steps.
%t A070791 limit = 10^3; x = NestList[ # + IntegerReverse[#] &, 5, limit];
%t A070791 Select[Range[680],
%t A070791 Intersection[NestList[ # + IntegerReverse[#] &, #, limit],
%t A070791 x] != {} &] (* _Robert Price_, Oct 20 2019 *)
%Y A070791 Cf. A070788 - A070790, A070792 - A070798, A063049.
%K A070791 base,nonn
%O A070791 1,1
%A A070791 _Klaus Brockhaus_, May 07 2002