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 A066958 #9 Sep 21 2013 12:42:14 %S A066958 0,0,1,0,3,0,3,3,3,0,9,0,3,6,6,3,9,0,9,6,6,0,15,6,3,12,9,0,15,0,15,9, %T A066958 6,6,18,6,3,12,18,6,21,0,9,12,6,6,27,6,9,12,18,6,15,12,18,18,6,0,33,0, %U A066958 15,18,18,9,18,12,9,18,18,0,39,6,9,24,18,12,18,0,27,18,15,6,33,12,6,24,30 %N A066958 Number of ordered primitive solutions (x,y,z) to xy + yz + zx = n with x,y,z >= 1. %H A066958 T. D. Noe, <a href="/A066958/b066958.txt">Table of n, a(n) for n=1..1000</a> %Y A066958 Cf. A066851. %K A066958 nonn,easy %O A066958 1,5 %A A066958 _Colin Mallows_, Jan 26 2002 %E A066958 More terms from _Vladeta Jovovic_, Apr 14 2002