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 A107576 #2 Mar 30 2012 18:57:06 %S A107576 9,11,12,13,13,14,15,15,15,16,16,17,17,17,17,18,18,18,19,19,19,19,19, %T A107576 20,20,20,20,21,21,21,21,21,21,21,22,22,22,22,22,23,23,23,23,23,23,23, %U A107576 23,24,24,24,24,24,24,24,25,25,25,25,25,25,25,25,25,25,26,26,26,26,26,26 %N A107576 a(n)=perimeter of n-th triangle listed at A107572. %C A107576 The number of perimeters equal to n+6 is A005044(n). %e A107576 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 perimeters are 9,11,12,13,13. %Y A107576 Cf. A107572, A107573, A107574, A107575, A107577, A005044, A070080. %K A107576 nonn %O A107576 1,1 %A A107576 _Clark Kimberling_, May 16 2005