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 A008708 #8 Jul 08 2025 01:20:07 %S A008708 10,11,12,13,14,15,21,23,102,1011,11111111111 %N A008708 11 in base 11-n. %K A008708 fini,nonn,base,full %O A008708 0,1 %A A008708 _N. J. A. Sloane_