Working on improving the quadratics to help verify (x+n) iteration path. Check this out, found a major (but very basic) improvement for the formula. Staet with the difference of squares equation, and sub in (Tu XPN Est) for the small square. Then begin to solve the equation for n (isolate n). When taking SQRT of c and (Tu XPN Est), we need to include the remainders of both c and (Tu XPN). c = dd + e. For clarity, I'll call remainder of SQRT(Tu XPN) var g.
c = (d+n)^2 - (Tu XPN Est)^2
c + (Tu XPN Est)^2 = (d+n)^2
Floor SQRT(c) + e + Floor SQRT(Tu XPN Est) + g = d + n
dd + e + (Tu XPN Est) + g = d + n
dd + e + (Tu XPN Est) + g - d = n
We're looking for a match where n is a whole integer. Should be easy to spot in a list of calcs.