Don't know the exact number but here's how to go about it
1 = 1,1 = 1 point
2 = 1,2 2,1 = 2 points
3 = 1,3, 3,1 = 2 points
4 = 1,4 4,1 2, 2 = 3 points
......
28 = 1,28 28,1 2,14 14,2 4,7 7,4 = 6 points
29 = 1,29 29,1 = 2 points
You need to fill in the rest from 5 to 27, inclusive