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 A070131 #7 Mar 30 2012 18:50:20 %S A070131 8,13,20,21,25,29,30,36,37,41,42,44,49,56,57,59,62,66,67,69,74,75,77, %T A070131 78,79,80,86,89,96,97,99,100,101,102,105,110,111,113,115,122,123,125, %U A070131 126,127,128,130,131,138,141,144,147,152,153 %N A070131 Numbers n such that [A070080(n), A070081(n), A070082(n)] is an obtuse scalene integer triangle with relatively prime side lengths. %H A070131 R. Zumkeller, <a href="/A070080/a070080.txt">Integer-sided triangles</a> %e A070131 a(20)=69: [A070080(69), A070081(69), A070082(69)]=[5<6<9], A070084(69)=gcd(5,6,9)=1, A070085(69)=5^2+6^2-9^2=25+36-81=-20<0. %Y A070131 Cf. A070104, A070110, A070127, A070112. %K A070131 nonn %O A070131 1,1 %A A070131 _Reinhard Zumkeller_, May 05 2002