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Summing up factorials (Posted on 2018-09-02) Difficulty: 3 of 5
How many perfect cubes below 10^6 can be expressed as the sum of two or more distinct integer factorials ?

Rem: only 1! will be considered to represent number 1, 0! is not needed, since 0!+1! can be replaced by 2!, and no factorial can be repeated in the representation of any cube.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionJer2018-09-02 11:37:26
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