Okay there is definitely a link between the base of the triangle in an odd (x+n) square and the way that t and (x+n) scale for that cell's (e,n). Definitely.

As you can see here, the difference between the triangle base and t doesn't change if n doesn't change. So if we're going to calculate the triangle base directly from t, it'll probably involve n. It might still be worth looking into anyway.

This one has a constant e and a changing n. It shows that n is causing the scaling change between the triangle base and t. I'm still not sure how, but there is definitely some way to calculate the base of the triangles in an odd (x+n) square from the t value of its (e,n).