Meaning of tetrahedral number | Babel Free
Definitions
A number which results from the summation of consecutive triangular numbers, starting from 1. If the triangular numbers in such a summation are depicted as horizontal triangular arrays of units then these arrays can be stacked vertically to yield a tetrahedral array.
Examples
“The nᵗʰ tetrahedral number⟳ can be calculated with the formula #123;(n#43;1)³-(n#43;1)#92;over 6#125;.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See also
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