To calculate tetrahedral numbers online calculator


Online calculator which helps you calculate the tetrahedral number.

A tetrahedral number is a figure number that represents a pyramid, the base of which lies the triangle.

An example of the first few tetrahedral numbers:
1, 4, 10, 20, 35, 56, 84, 120, 165, 220, 286, 364, 455, 560, 680, 816, 969, ... (A000292 sequence in OEIS).

Specify a positive number (n):

Tetrahedral number (Tn):