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 A298044 #13 Feb 16 2025 08:33:53 %S A298044 15,15,30,45,10,63,99,55,52,187,195,374,33,396,418,286,510,570,572, %T A298044 490,221,63,273,910,1050,1092,660,1160,882,885,1148,1485,1505,1092, %U A298044 495,1870,308,858,1485,585,990,385,1333,1001,2907,3045,2277,1394,1475,2310,3690,594,3885,3465,2755,1496,4422,2730,3393 %N A298044 1/16 of the edge with the largest 2-adic valuation of a primitive 3-simplex (0, b=A031173, c=A031174, d=A031175). %C A298044 Each primitive 3-simplex (0,b,c,d) with b > c > d is built by an odd, an even and an edge with the largest 2-adic valuation. %H A298044 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TrirectangularTetrahedron.html">Trirectangular Tetrahedron</a> %Y A298044 Cf. A298046, A298047, A031173, A031174, A031175. %K A298044 nonn %O A298044 1,1 %A A298044 _Ralf Steiner_, Jan 11 2018