Those pesky powers of 2

Excel 2007: The problem is that the 3rd column contains =a2*b2 … (the first 500 numbers for 2^32 pass, though…)

 

13 5041.154 100000
26 2520.577 100000
49 1337.449 100000
52 1260.288 100000
81 809.0741 100000
87 753.2759 100000
93 704.6774 100000
98 668.7245 100000
104 630.1442 100000
107 612.4766 100000
115 569.8696 100000
117 560.1282 100000
119 550.7143 100000
123 532.8049 100000
162 404.537 100000
169 387.7811 100000
173 378.815 100000
174 376.6379 100000
186 352.3387 100000

etc. etc.

 

Is there a pattern in there?