Need help IDing a tree. [View All]

[uppityperson]

It is deciduous, with an odd leaf arrangement. At first glance it appears to be palmated, but along each of the main center ribs of each finger there are leaves going out sideways pinnated. I've search several keys but no matter which way I go, palmate or pinnate, I can find nothing like this.

Think of a horse chestnut with its beautifully palmated leaves. Keep that structure for the bones but then make leaves pinnately on alternate sides of the center ribs or each finger going out from the palm. Does this make sense? Any thoughts?

I saw this tree in a neighbor's yard and thought it striking. Thank you.