The "ideal" spacing is typically 25'-35' depending on the literature, slope of land, etc. A diamond pattern will be the most efficient per acre. Perfect 30' diamond pattern spacing yields about 64 trees per acre.
A 35'-36' square grid has a diagonal distance across the grid of 50', planting an offset row in the middle would create an imperfect diamond pattern at about 72 trees per acre.
Remember, sugar maples like drier soils. Drainage will significantly affect the growth rate and survival of sugars, Reds are obviously more forgiving. Some sugars planted in NH were ready in about 27 years and are now 15" across dbh, others (wetter) are still not there after 36 years.
A family of maple heads
Father has over 15,000 taps
Brother has 2,000 taps
I'm just the help!!