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 A334677 #5 Jun 18 2020 14:09:05 %S A334677 1,1,1,2,1,3,2,4,2,5,4,7,4,8,6,10,8,12,10,14,11,16,14,19,16,21,18,24, %T A334677 19,27,24,30,23,33,30,37,32,40,35,44,39,48,44,52,45,56,50,61,56,65,57, %U A334677 70,64,75,70,80,72,85,80,91,80,96,90,102,95,108,100,114,103,120,114 %N A334677 Number of integer-sided triangles with nonintegral area and perimeter A009005(n). %H A334677 Wikipedia, <a href="https://en.wikipedia.org/wiki/Integer_triangle">Integer Triangle</a> %e A334677 a(1) = 1; There is one integer-sided triangle with perimeter A009005(1) = 3 whose area is not an integer, [1,1,1] with area sqrt(3)/4. %e A334677 a(2) = 1; There is one integer-sided triangle with perimeter A009005(2) = 5 whose area is not an integer, [1,2,2] with area sqrt(15)/4. %Y A334677 Cf. A005044, A009005, A051516, A051518. %K A334677 nonn %O A334677 1,4 %A A334677 _Wesley Ivan Hurt_, May 08 2020