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 A196391 #6 Mar 30 2012 18:57:50 %S A196391 6,12,15,18,20,28,24,30,45,30,42,66,35,36,40,45,56,91,42,72,120,48,60, %T A196391 90,153,54,60,84,110,190,60,63,75,84,132,231,66,156,276,70,72,77,80, %U A196391 90,112,135,182,325,78,210,378,84,99,105,144,240,435,88,90,100 %N A196391 Positive integers b for which there is a (-6)-Pythagorean triple (a,b,c) satisfying a<=b. %C A196391 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %t A196391 (See A196383.) %Y A196391 Cf. A195770, A196390, A196392, A196393, A196394. %K A196391 nonn %O A196391 1,1 %A A196391 _Clark Kimberling_, Oct 01 2011