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Smallest number that can be expressed as a sum of two positive cube numbers in n distinct ways
In mathematics, the nth taxicab number, typically denoted Ta(n) or Taxicab(n), is defined as the smallest integer that can be expressed as a sum of two positive integer cubes in n distinct ways. The most famous taxicab number is 1729 = Ta(2) = 1 3 + 12 3 = 9 3 + 10 3, also known as the Hardy-Ramanujan number. The name is derived from a conversation ca. 1919 involving mathematicians G. H. Hardy and... Wikipedia