# How to write the index number in the Wolfram Alpha search engine

I am trying to see some results for my sequence in Wolfram Alpha, but I don't know how to enter the "n" letter as an index. My sequence is a_(n+1) = ((3a_n)+2)/5. The reddit answer with underscores does not help a­­­­_(n+1) = (3a_n+2)/5, neither does the subscript function. subsrcript[a­­­­, n+1] = (3*subscript[a, n]+2)/. What is the right syntax?