Return how many integer grid points there are inside a 3D sphere of radius r centred at (0,0,0) (including points on the edge).
Neither string operations nor interpolations are allowed!
First N Perfect Squares
Back to basics 5 - Clipboard
Multiply 2 numbers
matrix of natural number
frame of the matrix
Volume of a Simplex
Chebyshev polynomials of the 1st Kind
Dots in a Diamond
Generalized Laguerre polynomials
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