¶ Tetrahedral Number
← Number: Tetrahedral Number | Number: Tetrahedral Number: N² - N / 2 →
Index Entry
Number: Tetrahedral Number: N^2 - N :
N^2 - N : is also the number of balls in a triangular
2
grouping such as that of pool balls grouped for the ‘break.’
(Am. Scholar, p. 48)
¶ Citations
- PLANETARY PLANNING, p. 18, 13 Nov’69
