Precomputation
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In algorithms, precomputation is the act of performing an initial computation before run time to generate a lookup table that can be used by an algorithm to avoid repeated computation each time it is
Part of a 20th-century precomputed mathematical table of common logarithms.
Multiplication table
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In mathematics, a multiplication table is a mathematical table used to define a multiplication operation for an algebraic system.
The Tsinghua Bamboo Slips, Chinese Warring States era decimal multiplication table of 305 BC
"Table of Pythagoras" on Napier's bones