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 A363839 #28 Jun 24 2023 05:43:34 %S A363839 1,10,2,3,4,5,6,7,8,9,1,10,0,1 %N A363839 Numbers in the witch's multiplication table (German: "Hexeneinmaleins") in Goethe's Faust. %C A363839 In German, the witch declaims the following magic spell to Faust: %C A363839 Du mußt verstehn! %C A363839 Aus Eins[1] mach' Zehn[10], %C A363839 Und Zwey[2] laß gehn, %C A363839 Und Drey[3] mach' gleich, %C A363839 So bist du reich. %C A363839 Verlier' die Vier[4]! %C A363839 Aus Fünf[5] und Sechs[6], %C A363839 So sagt die Hex', %C A363839 Mach' Sieben[7] und Acht[8], %C A363839 So ist's vollbracht: %C A363839 Und Neun[9] ist Eins[1], %C A363839 Und Zehn[10] ist keins[0]. %C A363839 Das ist das Hexen-Einmal-Eins[1]! %C A363839 (The numbers in "[...]" do not apppear in the original.) %C A363839 Literal translation into English: %C A363839 You must understand! %C A363839 From one make ten, %C A363839 And two let go, %C A363839 And three make equal, %C A363839 So you are rich. %C A363839 Lose the four! %C A363839 From five and six, %C A363839 So says the witch, %C A363839 Make seven and eight, %C A363839 So it is finished: %C A363839 And nine is one, %C A363839 And ten is none. %C A363839 This is the Witch's one-times-one! %C A363839 . %C A363839 From _Peter Luschny_, Jun 23 2023: (Start) %C A363839 Sometimes the witch's one-times-one is interpreted as a construction guide for a magic square, which describes a transformation like this: %C A363839 1 2 3 4 9 2 %C A363839 4 5 6 -> 3 5 7 %C A363839 7 8 9 8 1 6 %C A363839 (End) %H A363839 Johann Wolfgang von Goethe: Faust - Der Tragödie erster Teil. <a href="https://de.wikisource.org/w/index.php?title=Seite:Faust_I_(Goethe)_161.jpg&oldid=-">Page 161</a> and <a href="https://de.wikisource.org/w/index.php?title=Seite:Faust_I_(Goethe)_162.jpg&oldid=-">page 162</a>. Tübingen: Cotta, 1808. Digital full-text edition at Wikisource, version of Aug 18 2016. %H A363839 Poetry in Translation, <a href="https://www.poetryintranslation.com/PITBR/German/FaustIScenesIVtoVI.php#Scene_VI">Faust Scene VI</a>, translated by A. S. Kline, 2003. %H A363839 Wikipedia (German), <a href="https://de.wikipedia.org/wiki/Hexeneinmaleins">Hexeneinmaleins</a>. %Y A363839 Cf. A080992, A108579. %K A363839 nonn,word,fini,full %O A363839 1,2 %A A363839 _Georg Fischer_, Jun 23 2023