Brain Game: Seek Whence
By BY

Thanks for playing the Tuesday Brain Game. What's the next number in this sequence?
1, 2, 6, 42, 1806, ?
Here is the SOLUTION.
THE SOLUTION:
3,263,442
The formula for the sequence is Z x (Z+1) and is shows as follows:
1 x (1+1) = 2
2 x (2+1) = 6
6 x (6+1) = 42
42 x (42+1) = 1806
so the next number is:
1806 x (1806+1) = 3,263,442