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 A195998 #5 Mar 30 2012 18:57:49 %S A195998 3,18,18,45,10,20,84,35,60,135,28,198,77,126,273,104,45,360,216,459, %T A195998 88,170,570,209,330,693,130,105,36,299,468,350,55,630,56,238,464,189, %U A195998 527,304,63,91,665,740,297,110,460,126,550,429,143,135,90,187,189 %N A195998 Positive integers b for which there is a primitive (-2/3)-Pythagorean triple (a,b,c) satisfying a<=b. %C A195998 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %t A195998 (See A195994.) %Y A195998 Cf. A195770, A195994, A195997, A195999. %K A195998 nonn %O A195998 1,1 %A A195998 _Clark Kimberling_, Sep 26 2011