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!
Back to basics 23 - Triangular matrix
find radius of cone
Free passes for everyone!
Matrix to column conversion
Shifted Hexagonal Tiling Dots in a Circle
Triangular Tiling Dots in a Circle
Edges of a n-dimensional Hypercube
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