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Not too much (Posted on 2015-02-20) Difficulty: 2 of 5
What is the sum of the reciprocals of all the nonzero
triangular numbers?

No Solution Yet Submitted by Ady TZIDON    
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Hints/Tips re(3): Is this valid? no ! - partial spoiler Comment 8 of 8 |
(In reply to re(2): Is this valid? no ! - partial spoiler by Charlie)

    I have erased- my  erroneous text

The sum is  2.

  Posted by Ady TZIDON on 2015-02-21 14:15:13
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