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 A196239 #5 Mar 30 2012 18:57:49 %S A196239 2,4,15,6,14,40,8,15,30,77,6,10,28,52,126,12,28,45,80,187,14,20,66, %T A196239 114,260,16,30,60,91,154,345,18,42,120,200,442,12,20,33,56,75,104,153, %U A196239 252,551,22,72,190,310,672,24,45,56,90,160,231,374,805,26,110,276 %N A196239 Positive integers b for which there is a 10-Pythagorean triple (a,b,c) satisfying a<=b. %C A196239 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %t A196239 (See A196238.) %Y A196239 Cf. A195770, A196238, A196240, A196242. %K A196239 nonn %O A196239 1,1 %A A196239 _Clark Kimberling_, Sep 29 2011