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 A127326 #10 Dec 21 2022 04:39:26 %S A127326 0,0,1,0,0,0,1,0,0,2,1,1,0,0,0,0,1,0,0,2,1,1,0,0,0,3,2,2,1,1,1,0,0,0, %T A127326 0,0,1,0,0,2,1,1,0,0,0,3,2,2,1,1,1,0,0,0,0,4,3,3,2,2,2,1,1,1,1,0,0,0, %U A127326 0,0,0,1,0,0,2,1,1,0,0,0,3,2,2,1,1,1,0,0,0,0,4,3,3,2,2,2,1,1,1,1,0,0,0,0,0 %N A127326 Hypertetrahedron with T(W,X,Y,Z) = X - Y. %C A127326 Together with A127324, A127325 and A127327 might enable reading "by antidiagonals" of hypercube arrays as 4-dimensional analog of A056558, A056560 and A056559 with cubical arrays. %F A127326 a(n) = A127322(n) - A127323(n). %e A127326 a(23)=0 because A127322(23) - A127323(23) = 0. %e A127326 See A127327 for a table of A127324, A127325, A127326, A127327. %Y A127326 Cf. A127322, A127323, A127324, A127325, A127327. %Y A127326 Cf. A056558, A056560, A056559. %K A127326 nonn %O A127326 0,10 %A A127326 _Graeme McRae_, Jan 10 2007