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 A120130 #27 May 17 2023 15:52:57 %S A120130 5,13,17,39,37,52,75,65,85,119,185,229,125,169,205,241,409,195,615, %T A120130 145,265,445,1111,340,555,507,663,485,765,221,493,377,715,865,689,425, %U A120130 325,1465,1131,845,1015,481,3365,2165,1037,949,901,1855,4715,697,2516,925 %N A120130 First value for longest side common to exactly n primitive Heronian triangles. %H A120130 Ray Chandler, <a href="/A120130/b120130.txt">Table of n, a(n) for n = 1..2819</a> (first 1247 terms from Giovanni Resta) %H A120130 Michael Somos, <a href="https://grail.eecs.csuohio.edu/~somos/tritab.html">Heronian Triangle Table</a> %H A120130 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 A120130 Cf. A120131, A306626. %K A120130 nonn %O A120130 1,1 %A A120130 _Lekraj Beedassy_, Jun 10 2006 %E A120130 More terms from _Giovanni Resta_, Nov 07 2019