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 A174991 #2 Mar 30 2012 18:40:52 %S A174991 20,6,20,20,19,19,14,14,6,6,20,6,20,20,19,19,14,14,6,6,20,20,20,20,20, %T A174991 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,19,19,19,19,19,19,19,19, %U A174991 19,19,19,19,19,19,19,19,19,19,19,19,14,14,14,14,14,14,14,14,14,14,14 %N A174991 A005606 applied to itself. %C A174991 Position in the alphabet of the first letter of the position of the alphabet of the first letter of n (in English). %F A174991 a(n) = A005606(A005606(n)). %e A174991 a(0) = 20 because "zero" begins with 'Z' and 'Z' is the twentieth letter hence A005606(0)=26; "twentysix" begins with "T" which is the twentieth letter in the alphabet. a(1) = 6 because "one" begins with 'O' and 'O' is the fifteenth letter hence A005606(1)=15; "fifteen" begins with "F" which is the sixth letter in the alphabet. %Y A174991 Cf. A005606, A114332. %K A174991 easy,nonn,word %O A174991 0,1 %A A174991 _Jonathan Vos Post_, Apr 03 2010