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 A051518 #34 Feb 16 2025 08:32:41 %S A051518 12,16,18,24,30,32,36,40,42,44,48,50,54,56,60,64,66,68,70,72,76,78,80, %T A051518 84,88,90,96,98,100,104,108,110,112,114,120,126,128,130,132,136,140, %U A051518 144,150,152,154,156,160,162,164,168,170,172,174,176,180,182,186,190,192,196,198,200,204 %N A051518 Perimeters of Heronian triangles. %C A051518 A triangle with integer sides and area is also called a Heronian triangle, and every such triangle can be positioned in the plane so that its three vertices have integer coordinates. - _Peter Kagey_, Jan 24 2018 %H A051518 Peter Kagey and Giovanni Resta, <a href="/A051518/b051518.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Peter Kagey) %H A051518 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HeronianTriangle.html">Heronian Triangle</a> %H A051518 Wikipedia, <a href="https://en.wikipedia.org/wiki/Heronian_triangle">Heronian triangle</a> %Y A051518 Cf. A096468, A298079. %Y A051518 Positions of nonzero values in A051516. %K A051518 nonn %O A051518 1,1 %A A051518 _David W. Wilson_ %E A051518 Name changed by _Wesley Ivan Hurt_, May 16 2020