17 Multiples of 8 plus 1 
7 Burning Rope 
11 Measuring Up 
17 

Multiples of 8 plus 1 
4 

The Middle of Nowhere 
Multiples of 8 plus 1
I kind of ended up with something similar, but I didn't quite use a formal proof. I noticed right away that 8 was multiplied by a triangular increasing number, or that it was the sum + x, or n(n+1)/2. You can multiply this by 8 and get 4n(n+1) + 1 = x^2. With a little work you can then notice the pattern in x, is that it is 2n+1, or the progression of odd numbers. In summary, 4n(n+1) + 1 = (2n+1)^2 context 