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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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limit is 2 | Comment 7 of 8 |
see here

  Posted by Benny on 2015-02-21 01:38:50
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