10
57
One number does not make a sequence (nor a series).
The number 7 comes next.
mcmlx
10
57
One number does not make a sequence (nor a series).
11 comes next.
The number 7 comes next.
There is no series of number: just one very large number!
10
mcmlx
It is: 4554
A single number cannot define a sequence, even less a series.
The series seems to be "add 3," so the next number in the series would be 12 followed by 15.
18