

A068195


Numbers of the form n(n+1)/2 whose only representation as a sum of 2 or more consecutive positive integers is 1+2+...+n.


2



1, 3, 6, 10, 28, 136, 496, 8128, 32896, 33550336, 2147516416, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176
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