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 A306359 #10 Feb 11 2019 08:56:13 %S A306359 0,196,196,196,196,196,196,196,196,0,196,879,196,196,879,196,879,196, %T A306359 879,196,879,196,879,196,879,0,196,879,196,879,196,879,196,879,196, %U A306359 879,196,879,1997,196,879,196,879,196,879,196,879,196,879,196,879,1997,196,196,196,196,196,196,879,196,196,879,196,196,879 %N A306359 a(n) is the seed as given in A063048 such that the Lychrel number in A023108(n) joins the trajectory of this seed; 0 if A023108(n) is a seed. %C A306359 If A023108(n) in A063048 then a(n) = 0 else a(n) in A063048. %H A306359 A.H.M. Smeets, <a href="/A306359/b306359.txt">Table of n, a(n) for n = 1..20000</a> %Y A306359 Cf. A023108, A063048. %K A306359 nonn,look,base %O A306359 1,2 %A A306359 _A.H.M. Smeets_, Feb 10 2019