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 A295507 #27 Feb 16 2025 08:33:52 %S A295507 13,175,490,85,308,13475,3179,9295,19760,60775,55315,225420,203665, %T A295507 9724,512050,568854,207740,252700,2684396,8695050,1221025,140875, %U A295507 3121937,311220,21390460,12289004,17331908,20074032,44144100,18055947,21118608,21017325,40245205,4418232 %N A295507 1/15840 of the volume of a primitive 3-simplex. %C A295507 The volume of every primitive trirectangular tetrahedron with integer sides is divisible by 15840. See A031173 for more comments. %C A295507 These primitive trirectangular tetrahedrons are primitive 3-simplices. %H A295507 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TrirectangularTetrahedron.html">Trirectangular Tetrahedron</a> %F A295507 a(n) = (1/15840)*A031173(n)*A031174(n)*A031175(n)/6. %Y A295507 Cf. A031173, A031174, A031175. %K A295507 nonn %O A295507 1,1 %A A295507 _Ralf Steiner_, Nov 23 2017