[2,1]

[3,1]

[4,1], [4,2]

[5,1], [5,2]

[6,1], [6,2], [6,3]

[7,1], [7,2], [7,3]

[8,1], [8,2], [8,3], [8,4]

[9,1], [9,2], [9,3], [9,4]

[10,1], [10,2], [10,3], [10,4], [10,5]

[11,1], [11,2], [11,3], [11,4], [11,5]

[12,1], [12,2], [12,3], [12,4], [12,5], [12,6]

[13,1], [13,2], [13,3], [13,4], [13,5], [13,6]

[14,1], [14,2], [14,3], [14,4], [14,5], [14,6] [14,7]

[15,1], [15,2], [15,3], [15,4], [15,5], [15,6] [15,7]