Verified answer

d) 2, 3, 8, 63... =

= 2, (2^2 - 1), ( 3^2 - 1), (8^2 - 1), (63^2 - 1 = 3968),

3968^2 - 1 = 15745023.

e) 2, 5, 11, 23, 47 =

= 2, 2*2 + 1, 5*5 + 1, 11*2 + 1, 23*2 + 1, 47*2 + 1 = 95, 95*2 + 1 = 191.