No worries, from the formula we could say:
“1st term, N = 1, A = N² = 1² = 1“
“2nd term, N = 2, A = N² = 2² = 4“
“3rd term, N = 3, A = N² = 3² = 9“
But the general formula of A = N² works for any term, whether it’s the 1st, 2nd, 18th or 9,898,781th.
So, we say the formula is for the Nth term. We then replace N with whatever term it is we want to find.