Are these the missing numbers:
42, 72, 110

The pattern would be:
Start with 1 in the innermost upper-right box, then fill each sequential number into the clockwise-adjacent box in the same ring.
On the 4th box of the ring, move to the adjacent outer ring box and continue filling in.
Then, for each gray square, multiply by the previous index value.
1 x 0
2
3 x 2
4
5
6 x 5
7 x 6
8
9 x 8
10
11 x 10
12
A slightly different pattern would be:
210, 72, 110
If you multiply by the previous box's value instead of the original number (7 x 30 instead of 7 x 6)