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 A107574 #2 Mar 30 2012 18:57:06 %S A107574 3,4,4,5,4,5,6,5,5,6,5,7,6,5,6,7,6,6,8,7,6,7,6,8,7,6,7,9,8,7,8,6,7,7, %T A107574 9,8,7,8,7,10,9,8,9,7,8,7,8,10,9,8,9,7,8,8,11,10,9,10,8,9,7,8,9,8,11, %U A107574 10,9,10,8,9,8,9,12,11,10,11,9,10,8,9,10,8,9,9,12,11,10,11,9,10,8,9,10,9,13 %N A107574 a(n)=middle sidelength of n-th triangle listed at A107572. %e A107574 The first 5 integer-sided scalene triangles (a,b,c) with a<b<c are (2,3,4), (2,4,5), (3,4,5), (2,5,6), (3,4,6), of which the middle sidelengths are 3,4,4,5,4. %Y A107574 Cf. A107572, A107573, A107575, A107576, A107577, A005044, A070080. %K A107574 nonn %O A107574 1,1 %A A107574 _Clark Kimberling_, May 16 2005