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 A306851 #9 May 07 2019 15:29:08 %S A306851 1,2,4,12,13,14,51 %N A306851 Records for the number of 'Reverse and Add' steps in base 8, needed for a Lychrel number to join the trajectory of a smaller Lychrel number (i.e., its seed). Record setting numbers in A306850. %Y A306851 Cf. A306596. Record setting numbers in A306850. %K A306851 nonn,base,more %O A306851 1,2 %A A306851 _A.H.M. Smeets_, Mar 13 2019