1,2,6,42,____...

What comes next?

To get the Nth term you square the (N-1)st term and then add the (N-1)st term.

2=1^2+1
6=2^2+2
42=6^2+6

So the next number will be:

1806, which is 42^2+42

Posted by Lewis on 2003-08-06 01:22:06