👉 Heptadic, also known as a heptagonal number or a heptagonal integer, is a figurate number that consists of three prime numbers arranged in an equilateral triangle shape. Heptadic numbers are defined by the formula: \[ n^3 = n \cdot (n + 1) \cdot (2n + 1) \] Where \(n\) is any positive integer. The heptadecagon, with 7 sides and 8 vertices,
