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 A334759 #12 Feb 01 2021 19:13:15 %S A334759 24,48,60,72,80,96,112,120,140,144,160,168,180,192,216,224,240,252, %T A334759 264,280,288,300,308,312,320,336,352,360,364,384,396,400,408,416,420, %U A334759 432,440,448,456,468,480,504,520,528,540,552,560,572,576,600,612,616,624,640,648,660 %N A334759 Perimeters of Pythagorean triangles with even side lengths. %H A334759 Wikipedia, <a href="https://en.wikipedia.org/wiki/Integer_triangle">Integer Triangle</a> %H A334759 <a href="/index/Ps#PyTrip">Index entries related to Pythagorean Triples.</a> %e A334759 a(1) = 24; There is one integer-sided right triangle with perimeter 24, [6,8,10] with all side lengths even. %Y A334759 Cf. A005044, A010814, A334607. %K A334759 nonn %O A334759 1,1 %A A334759 _Wesley Ivan Hurt_, May 10 2020