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 A195991 #5 Mar 30 2012 18:57:49 %S A195991 8,9,72,27,9,45,13,77,48,351,96,33,117,24,207,425,216,95,136,704,345, %T A195991 72,555,99,741,205,105,792,203,693,144,209,272,65,551,55,496,561,440, %U A195991 297,64,416,760,585,360,112,119,161,235,299,429,767,120,504,273 %N A195991 Positive integers b for which there is a primitive (1/3)-Pythagorean triple (a,b,c) satisfying a<=b. %C A195991 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %t A195991 (See A195939.) %Y A195991 Cf. A195770, A195939, A195990, A195992. %K A195991 nonn %O A195991 1,1 %A A195991 _Clark Kimberling_, Sep 26 2011