the answer will be 21
10
225
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
21
21
21.
21
The next number is 25 but there are the sequence is infinite so there can be no end to the sequence.
12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50
it should already have come out
There is no specific number. It all depends on what shows are good. Should a bunch of new series come out on year that nobody likes, many new series will come out to follow. That year, there would be many TV series. However, a year that has many great TV series that everybody watches would have little new series, thus having less TV series that year.