Determine-all-positive-integers-N-which-the-sphere-x-2-y-2-z-2-N-has-an-inseribed-regular-tetrahedron-whose-vertices-have-integer-coordinates-

Question Number 162522 by HongKing last updated on 30/Dec/21

Determine all positive integers

N which the sphere

x^{2} + y^{2} + z^{2} = N

has an inseribed regular tetrahedron

whose vertices have integer coordinates

Answered by mr W last updated on 30/Dec/21

Commented by HongKing last updated on 30/Dec/21

thank you my dear Sir, solution please