Given the sequence √ 3, √ 7, √ 11, √ 15,., then 5 √ 3 is its number one?

Given the sequence √ 3, √ 7, √ 11, √ 15,., then 5 √ 3 is its number one?

The numbers in the root sign are a set of arithmetic sequences of 4N-1
5√3=√75
4n-1=75
The solution is n = 19
So 5 √ 3 is item 19