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 A195997 #5 Mar 30 2012 18:57:49 %S A195997 2,5,7,8,9,9,11,12,13,14,15,17,18,19,20,21,22,23,25,26,27,27,29,30,31, %T A195997 32,33,34,35,36,37,39,42,43,45,45,45,46,48,51,52,54,54,57,58,63,63,65, %U A195997 69,70,72,76,77,78,80,81,82,85,90,90,94,95,99,99,100,110,114 %N A195997 Positive integers a for which there is a primitive (-2/3)-Pythagorean triple (a,b,c) satisfying a<=b. %C A195997 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %e A195997 Primitive (-2/3)-Pythagorean triples %e A195997 2,3,3 %e A195997 5,18,17 %e A195997 7,18,17 %e A195997 8,45,43 %e A195997 9,10,11 %e A195997 9,20,19 %e A195997 11,84,81 %e A195997 12,35,33 %e A195997 13,60,57 %e A195997 14,135,131 %t A195997 (See A195994.) %Y A195997 Cf. A195770, A195994, A195998, A195999. %K A195997 nonn %O A195997 1,1 %A A195997 _Clark Kimberling_, Sep 26 2011