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 A141614 #6 Mar 30 2012 18:51:59 %S A141614 8,4,8,4,8,4,12,8,4,8,12,4,8,4,8,4,12,12,8,4,8,12,4,8,4,8,4,8,16,8,4, %T A141614 8,16,8,4,8,4,8,4,12,8,4,8,12,12,4,12,8,4,12,8,4,8,12,4,8,12,4,8,4,20, %U A141614 4,8,12,4,12,12,8,4,12,8,4,8,16,8,12,4,8,4,12,12,8,12,4,8,4,8,4,8,16,8,12,12,4,8,4,12,8,4,12 %N A141614 First differences of A008846. %C A141614 Differences between Hypotenuses of primitive Pythagorean triangles. %F A141614 a(n)=A008846(n+1)-A008846(n). %Y A141614 Cf. A082073, A082075. %K A141614 nonn,easy %O A141614 1,1 %A A141614 _Paul Curtz_, Aug 23 2008 %E A141614 Offset set to 1 and extended by _R. J. Mathar_, Sep 07 2009