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 A298046 #14 Feb 16 2025 08:33:53 %S A298046 11,63,35,33,198,275,255,585,660,195,207,390,1449,187,1575,1683,1222, %T A298046 418,741,2457,2805,275,3465,270,2574,2205,4437,1518,3850,5369,5940, %U A298046 1225,6171,6426,3808,1950,7695,1890,8901,8976,9275,741,6435,297,10395,4615,12831,12870,13299,2133,13570,7843,10593,4901 %N A298046 1/4 of the even edge of least 2-adic valuation of a primitive 3-simplex (0, b=A031173, c=A031174, d=A031175). %C A298046 Each primitive 3-simplex (0,b,c,d) with b > c > d is built by 1 odd edge and 2 even edges; the edge that is considered here is the even one with the least 2-adic valuation. %H A298046 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TrirectangularTetrahedron.html">Trirectangular Tetrahedron</a> %Y A298046 Cf. A298044, A298047, A031173, A031174, A031175. %K A298046 nonn %O A298046 1,1 %A A298046 _Ralf Steiner_, Jan 11 2018