N^2 - 1 (sequence)

The correct title is n² - 1 (sequence). The reason for the naming is due to technical problems.

A number of the form $$n^2 - 1$$ can be represented by (n - 1)(n + 1).

It is one less than a square number.

These are the first 25 numbers of this form: 0, 3, 8, 15, 24, 35, 48, 63, 80, 99, 120, 143, 168, 195, 224, 255, 288, 323, 360, 399, 440, 483, 528, 575, 624.

All are composite numbers, except 0 and 3.