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 A217865 #14 Oct 15 2012 12:54:52 %S A217865 1,2,2,3,2,3,3,3,4,3,3,4,3,4,4,4,4,3,4,4,5,4,4,4,4,4,5,4,5,4,4,5,4,5, %T A217865 5,4,5,4,5,5,4,5,5,5,5,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,5,5,5,5,5,6, %U A217865 5,5,5,6,5,5,6,5,5,6,5,5,6,5,6,5,6,5,6 %N A217865 First differences of A050504. %F A217865 a(n) = A050504(n+1) - A050504(n). %o A217865 (JavaScript) %o A217865 for (i=1;i<88;i++) %o A217865 document.write(Math.floor((i+1)*Math.log(i+1))-Math.floor(i*Math.log(i))+", "); %Y A217865 Cf. A050504. %K A217865 nonn %O A217865 1,2 %A A217865 _Jon Perry_, Oct 13 2012