Pascal's triangle

noun
Pas·​cal's triangle | \pa-ˈskalz-, pä-ˈskälz-\

Definition of Pascal's triangle 

: a system of numbers arranged in rows resembling a triangle with each row consisting of the coefficients in the expansion of (a + b)n for n = 0, 1, 2, 3,  …

First Known Use of Pascal's triangle

1886, in the meaning defined above

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The first known use of Pascal's triangle was in 1886

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