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 A130764 #4 Oct 02 2022 14:41:42 %S A130764 65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87, %T A130764 88,89,90 %N A130764 ASCII codes for upper case letters. %C A130764 ASCII: American Standard Code for Information Interchange. %H A130764 Wikipedia, <a href="http://www.en.wikipedia.org/wiki/ASCII">ASCII</a>. %F A130764 a(n)=64+n, 0<n<27. %e A130764 A is code 65, B is code 66, Z is code 90. %t A130764 ToCharacterCode[CharacterRange["A","Z"]]//Flatten (* _Harvey P. Dale_, Oct 02 2022 *) %Y A130764 Cf. A109648, A109733, A121377. %K A130764 base,easy,fini,full,nonn %O A130764 1,1 %A A130764 _Omar E. Pol_, Aug 17 2007