I believe X is linear for all cells.
X is what I've been plotting by, instead of T. It shows you can move on a 3D linear path through cells.
Render of E0 with X for T.
While the diagonal lines are what pops out, the pattern stems from the E0,N1 column. X increases by 2 each T, and extends down N. It would probably fill in each N with a deep render.
From what I can tell, for any (E,N) X has an initial value, and a fixed growth value. X will start at the initial value, and += the growth value for every T.
Nope, I lied. Whatever X starts as is how it increments in the cell. This is true for the entire grid (please confirm) and why I initially began using X as T.
Horizontal lines are actually fixed N,D,X, and A, and are the incrementing of B. The 3D lines the incrementing of A.