Magic popcount numbers
Python 2, 52 49 46 bytes

The kth number is given by 2**512/(2**2**k + 1). This is for a 512 bit number, so it's trivial to extend the pattern to different widths.

l=2;exec"print'0x%0128x'%(2**512/-~l);l*=l;"*9


3 bytes saved thanks to Dennis.
3 bytes saved thanks to xnor.