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 A192740 #5 Mar 30 2012 18:40:14 %S A192740 1,3,7,12,16,25,36,48,61,72,83,95,108,118,133,151,170,183,201,214,231, %T A192740 252,275,298,320,337,361,383,406,423,446,472,496,521,540,558,582,603, %U A192740 618,638,661,683,706,721,741,764,789,813,829,851,875,899,923,944,970 %N A192740 Spanish version of A060403 - Each term is the previous term plus the number of letters in the previous number, as conventionally spelled out in Spanish. %C A192740 The sequence of words is: uno, tres, siete, doce, dieciseis, veinticinco, treinta y seis, ... %e A192740 a(5)= number of letters of uno-tres-siete-doce = 16. %K A192740 nonn,word %O A192740 1,2 %A A192740 _Claudio Meller_, Jul 09 2011