Thread: 1, 4, 9, 16 sequence

i'm new to java and i'm trying to make number sequence with one TextArea and one Button, using '\n' and '\t'
the result should look like this:
1 1 1
2 3 4
3 5 9
. . .
. . .
. . .
15 29 225

i got the first two columns but i need help with the third

import java.applet.Applet;
import java.awt.*;
 
public class talnarod extends Applet
{
	TextArea Ttafla;
	Button Bstart;
	int i, a, b, c;
 
	public void init()
	{
		Bstart = new Button("Start");
		Ttafla = new TextArea(15,25);
 
		this.add(Bstart);
		this.add(Ttafla);
	}
	public boolean action(Event e, Object o)
	{
		if (e.target == Bstart)
		{
			for (a=1; a <= 15; a++) //here i set the length of the sequence 1 to 15
			{
				b = a+a-1; //odd numbers for second column
				c = 1; //and here i need help !!!
				Ttafla.appendText("" + a + '\t' + b + '\t' + c + '\n');
			}
			return true;
		}
		return false;
	}
}

i need help with the third

What values go in the third column? How does the value relate to the row its on?

If its solved, please mark this thread as solved.