There are no letters in that sequence. The progression of numbers can be
extended according to the rule shown by appending '26' as the fifth term.
The next number in the sequence 2, 4, 16, 64 is 256.
a
16
1, 4,9, 16, 25, 36,49 this is the next three sequence po
65,536 is.
8
2and1
It is: 34
16 is the next squared number.
16 21 22 29
7 10 16 28
191 and then 420.