Squared triangular number

Nicomachus theorem

Simply put, you can think of it as calculating the volume of a cube by multiplying a 2-dimensional value by another 2-dimensional value. When generalized,

Faulhaber’s formula

The Nicomachus theorem is a special case of Faulhaber's formula when p=3

Squared triangular number

In number theory, the sum of the first n cubes is the square of the nth triangular number. That is,

https://en.wikipedia.org/wiki/Squared_triangular_number

Squared triangular number

Nicomachus theorem

Faulhaber’s formula

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