The 16 is 2*8, which is the following number. The 27 is 3*9, which is the following number. So the sequence seems to be, starting with n=7: n, 2*(n+1), n+1, 3*(n+2), n+2, 4(n+3), n+3, ... 7, 16, 8, 27, 9, 4*(7+3)=40, 10, ... 7/21/2014 | Philip P. read more