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 A196158 #5 Mar 30 2012 18:57:49 %S A196158 1,3,5,5,5,7,7,8,8,9,9,11,11,11,13,13,13,13,15,15,16,16,17,17,17,19, %T A196158 19,19,21,23,23,23,24,24,24,25,25,27,29,29,31,31,32,32,33,33,35,37,39, %U A196158 40,40,40,40,41,43,45,47,48,48,51,53,55,55,55,56,56,57,59,61 %N A196158 Positive integers a for which there is a primitive 5-Pythagorean triple (a,b,c) satisfying a<=b. %C A196158 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %e A196158 Primitive 5-Pythagorean triples a,b,c; %e A196158 c^2=a^2+b^2+k*a*b, where k=5: %e A196158 1,3,5 %e A196158 3,40,47 %e A196158 5,8,17 %e A196158 5,32,43 %e A196158 5,119,131 %e A196158 7,69,85 %e A196158 7,240,257 %e A196158 8,11,25 %e A196158 8,65,83 %e A196158 9,40,59 %t A196158 (See A196155.) %Y A196158 Cf. A195770, A196155, A196158, A196159, A196160. %K A196158 nonn %O A196158 1,2 %A A196158 _Clark Kimberling_, Sep 28 2011