[1] Find all positive integers that cannot be written as the sum of 2 or more consecutive positive integers.
[2] Find all integers that cannot be written as the sum of 2 or more consecutive integers.
[3] Find all positive integers that can only be written as the sum of 2 or more consecutive positive integers in one way.
(In reply to
possible solution by Dej Mar)
Counterexample for your [3]
18 = 2^2 * 3 = 5+6+7 = 3+4+5+6
Steve already disproved your [2]
I agree with your [1]. (Proof?)
{yes 3,4,5 is not different than 5,4,3}

Posted by Jer
on 20110415 00:22:27 