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 A121378 #10 Oct 21 2022 06:40:39 %S A121378 240,241,242,243,244,245,246,247,248,249 %N A121378 EBCDIC codes for decimal digits. %H A121378 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a> %H A121378 Wikipedia, <a href="http://en.wikipedia.org/wiki/EBCDIC">EBCDIC</a> %F A121378 a(n) = A121377(n) + 192. %e A121378 BIN: 11110000, 11110001, 11110010, 11110011, 11110100, 11110101, 11110110, 11110111, 11111000, 11111001; %e A121378 OCT: 360, 361, 362, 363, 364, 365, 366, 367, 370, 371; %e A121378 HEX: F0, F1, F2, F3, F4, F5, F6, F7, F8, F9. %Y A121378 Cf. A121377. %K A121378 nonn,base,fini,full %O A121378 1,1 %A A121378 _Reinhard Zumkeller_, Jul 25 2006