%I #10 Dec 21 2022 04:39:26
%S 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 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 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 Hypertetrahedron with T(W,X,Y,Z) = X - Y.
%C 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 a(n) = A127322(n) - A127323(n).
%e a(23)=0 because A127322(23) - A127323(23) = 0.
%e See A127327 for a table of A127324, A127325, A127326, A127327.
%Y Cf. A127322, A127323, A127324, A127325, A127327.
%Y Cf. A056558, A056560, A056559.
%K nonn
%O 0,10
%A _Graeme McRae_, Jan 10 2007