We're starting at n equals one. So this is going to be three times when n equals one, three times one minus one, and then plus, then we'll go to n equals two, three times two minus one. Then we're gonna go to n equals three, so plus three times three minus one. And then finally we're gonna go to n equals four. So plus three times, when n equals four, this is three times four minus one. So just to be clear, this is what we did when n equals one. Let me write it down, n equals one.