Tetrahedral / Triangular pyramidal number Calculator

Non-Negative Number (n) =
 
Tetrahedral Number (Tn) =

A triangular pyramidal number, or tetrahedral number represents a pyramid with a triangular base and three sides, called a tetrahedron.

Triangular pyramidal number Formula

Tetrahedral Number (Tn) = ( n × (n+1) × (n+2) ) / 6, Where, n is Non-Negative Numeral

1, 4, 10, 20, 35, 56, 84, 120, 165, 220 are triangular pyramidal numbers.

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