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 A019270 #12 Jan 04 2016 17:29:12 %S A019270 1,3,7,8,10,12,14,15,20,24,27,29,30,33,34,37,40,41,45,51,56,57,61,66, %T A019270 68,72,77,79,82,88,95,96,99,104,105,109,114,116,119,124,128,130,132, %U A019270 137,139,141,145,147,149,154,157,162,164,167,171,173,175,180 %N A019270 A self-descriptive sequence: positions of vowels in "one, three, seven,...". %C A019270 The following sequence of words has the property that it tells which letters in the sequence are vowels: one, three, seven, eight, ten, twelve, ... Now replace the words by their numerical values. %C A019270 If there is a choice, pick the smallest number (or word) that makes sense. Hyphens and spaces are ignored. %D A019270 E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris. %e A019270 The first vowel is the "o" in "one", in position 1, the second vowel is the "e" in "one", the third letter in the sentence (i.e. in position 3) and so on. %Y A019270 See A139133 for a version involving consonants. %Y A019270 See A139132 for a French version. %K A019270 word,nonn %O A019270 1,2 %A A019270 Scott Sauyet (ssauyet(AT)claude.math.wesleyan.edu)