Question

the next term in the following series is 1, 2 ,5 ,16 , 65 ,326 , what is the next number

Answer 1

1 = 1x 1 + 1 = 2x2 + 1 = 5 x 3  + 1 = 16 x 4 + 1 = 65 x 5 + 1 = 326x6 + 1 = 1957