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 A037933 #8 Aug 11 2024 14:41:31 %S A037933 34,2,17,7,31,17,43,3,7,83,3,13,97,31397 %N A037933 Trajectory of 34 under prime factor concatenation procedure. %H A037933 P. De Geest, <a href="https://www.worldofnumbers.com/topic1.htm">Home Primes</a> %Y A037933 Cf. A037273. %K A037933 fini,full,nonn,tabf,base %O A037933 0,1 %A A037933 _Jeff Burch_ %E A037933 Edited by _Charles R Greathouse IV_, Apr 30 2010