Similar to オイラーの五角数定理

Borsuk–Ulam theorem

Matroid

Möbius function

Dividing a circle into areas

Motzkin number

Young tableau

Finite geometry

Josephus problem

Latin square

Ramanujan's congruences

Alignments of random points

Lehmer code

Rogers–Ramanujan identities

Vinogradov's theorem

Green–Tao theorem

Dirichlet's theorem on arithmetic progressions

Lagrange's four-square theorem

Euclidean division

Siegel's theorem on integral points

Zeckendorf's theorem

Prime number theorem

Fermat polygonal number theorem

Chinese remainder theorem

Chen's theorem

Dirichlet's approximation theorem

Birch's theorem