We continue our objective of generalizing Ramanujan's eta-quotients for other orders p. Part I focused on prime p = 2, 3, 5, 7, 13. For Part II, it will be for the square orders p = 4, 9, 25.
Six other formulas for the j-function using eta-quotients will be given. Discussed along the way will be a fascinating connection to Ramanujan's continued fractions and, of all things, the Platonic solids.
We will also discuss pi formulas and the quadratic modular relations involving the McKay-Thompson series of class pA for Monster which explains those formulas and certain approximations.
