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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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re: no ! - partial spoiler | Comment 4 of 8 |
(In reply to re: Is this valid? no ! - partial spoiler by Ady TZIDON)

Line 2.  1/2 - 1/3 = 1/6, not 1/3.


I think Jer's approach is valid.  



  Posted by xdog on 2015-02-20 13:35:46
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