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 A120128 #19 Mar 12 2021 22:24:44 %S A120128 5,6,8,24,28,36,42,45,60,63,69,93,102,106,110,112,114,126,138,141,146, %T A120128 147,168,184,186,189,198,213,216,230,236,237,245,248,252,270,288,297, %U A120128 304,342,344,354,381,395,412,415,426,428,430,462,484,501,506,515,535 %N A120128 Longest side of exactly one primitive Heronian triangle. %H A120128 Giovanni Resta, <a href="/A120128/b120128.txt">Table of n, a(n) for n = 1..10000</a> %H A120128 Michael Somos, <a href="http://grail.eecs.csuohio.edu/~somos/tritab.html">Heronian Triangle Table</a> %H A120128 P. Yiu, <a href="http://math.fau.edu/yiu/RecreationalMathematics2003.pdf">Heron triangles with sides < 100</a>, Recreational Mathematics, Appendix Chap. 9.3 pp. 81/360. (This is a download of 360 pages.) %Y A120128 Cf. A120131. %K A120128 nonn %O A120128 1,1 %A A120128 _Lekraj Beedassy_, Jun 10 2006 %E A120128 Missing a(18) and more terms from _Giovanni Resta_, Nov 15 2019