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 A263772 #12 Nov 22 2015 15:24:49 %S A263772 9,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, %T A263772 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55, %U A263772 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79 %N A263772 Perimeters of integer-sided scalene triangles. %C A263772 All natural numbers larger than 8 except 10. %C A263772 Equivalently, numbers n that can be partitioned into three distinct parts a, b, and c, where a + b > c, a + c > b, and b + c > a (or, without loss of generality, into (a, b, c) with a < b < c < a + b). A subsequence of A009005. The unique terms in A107576. %C A263772 For k > 2, (k-1, k, k+1) gives perimeter 3k and (k-1, k+1, k+2) gives perimeter 3k + 2. For k > 3, the scalene triangle (k-1, k, k+2) has perimeter 3k + 1. %F A263772 a(n) = n + 9 for n > 1. %e A263772 The integer-sided scalene triangle of least perimeter has sides of lengths 2, 3, and 4, so a(1) = 2 + 3 + 4 = 9. %o A263772 (PARI) vector(100, n, if(n==1, 9, n+9)) \\ _Altug Alkan_, Oct 28 2015 %Y A263772 Cf. A005044, A009005, A107572, A107576. %K A263772 nonn,easy %O A263772 1,1 %A A263772 _Rick L. Shepherd_, Oct 27 2015