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 A126766 #5 Sep 25 2017 11:06:03 %S A126766 76,7,8,16,8,16,10,7,40,11,27,12,308,13,84,9,128,17,28,16,16,16,34,12, %T A126766 20,17,91,12 %N A126766 Minimum length of longest edge of a tetrahedron with integer edges and integer volume 3*n. %C A126766 A tetrahedron with integer edges has an integer volume only when the volume is a multiple of 3. It is unknown whether such tetrahedra exist for every multiple of 3. %H A126766 K. L. Dove and J. S. Sumner, <a href="http://www.jstor.org/stable/2690489">Tetrahedra with Integer Edges and Integer Volume</a>, Mathematics Magazine, Volume 65(2), April 1992, pp. 104-111. %K A126766 more,nonn %O A126766 1,1 %A A126766 _William Rex Marshall_, Feb 15 2007