Hardy-Ramanujan Number

The Hardy-Ramanujan Number is 1,729.Hardy-Ramanujan Number -- from Wolfram MathWorld G. H. Hardy comments about this number:
"Once, in the taxi from London, Hardy noticed its number, 1729. He must have thought about it a little because he entered the room where Ramanujan lay in bed and, with scarcely a hello, blurted out his disappointment with it. It was, he declared, 'rather a dull number,' adding that he hoped that wasn't a bad omen. 'No, Hardy,' said Ramanujan, 'it is a very interesting number. It is the smallest number expressible as the sum of two cubes in two different ways.' "
This is because 1,729 = + = + .
Ta(n), the nth , is the smallest number expressible as the sum of two cubes in n different ways.
== Sources ==
== External links ==
*1729 and Taxi Cabs - Numberphile
Category:Numbers
Category:Class 1
Category:Eponymous numbers
Category:Non-powers
Category:Numbers with 4 to 6 digits
Category:Odd numbers