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 A037929 #8 Aug 11 2024 14:41:31 %S A037929 26,2,13,3,71,7,53,3,251,3251 %N A037929 Trajectory of 26 under prime factor concatenation procedure. %H A037929 P. De Geest, <a href="https://www.worldofnumbers.com/topic1.htm">Home Primes</a> %Y A037929 Cf. A037273. %K A037929 fini,full,nonn,tabf,base %O A037929 0,1 %A A037929 _Jeff Burch_ %E A037929 Edited by _Charles R Greathouse IV_, Apr 30 2010