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There are 10 positive integers less than 1000 that cannot be written as the sum of consecutive natural numbers.
EXAMPLES: 11 = 5 + 6
13 = 6 + 7
15 = 1 + 2 + 3 + 4 + 5
Two of the numbers that cannot be written as the sum of consecutive natural numbers are 1 and 2. Find the other 8 numbers.
There are 10 positive integers less than 1000 that cannot be written as the sum of consecutive natural numbers.
EXAMPLES: 11 = 5 + 6
13 = 6 + 7
15 = 1 + 2 + 3 + 4 + 5
Two of the numbers that cannot be written as the sum of consecutive natural numbers are 1 and 2. Find the other 8 numbers.

1, 2, 4, 8, 16, 32, 64, 128, 256, 512
I just found the first few (4, 8, 16) and noticed a pattern. You just multiply by 2 each time.
I just found the first few (4, 8, 16) and noticed a pattern. You just multiply by 2 each time.