That depends what the pattern of the sequence is.
-11n + 17
5, 8, 11, 14 and 17.
It is: nth term = 35-9n
The sequence goes up by 5 each time; the first term is two. So the nth term is 2 + 5n. n=50 => 2+50*5 = 252.
tn=5n-3
I suspect that the first term should be "negative 3", ie the sequence is -3, 1, 5, 9, 13, 17, ... The nth term is 4n - 7
37
5, 11, 17, 23, 29
29
9, 17, 25, 33, 41
-11n + 17
5, 8, 11, 14 and 17.
It is: nth term = 35-9n
5
7n - 4
The nth term is 5n-3 and so the next term will be 22
The nth term is 7n-4 and so the next number in the sequence is 31