This series is of the function f(x) = x2+1, starting with x=0.
The next number in the series is 26. The number after that is 37.
1204
57
10
The number 7 comes next.
One number does not make a sequence (nor a series).
11 comes next.
The pre-penultimate element of the series.
1204
57
10
The series seems to be "add 3," so the next number in the series would be 12 followed by 15.
The number 7 comes next.
One number does not make a sequence (nor a series).
There is no series after GT yet.
7 then 7 then 5 then 6
T
16.