Numbered heap tree images:

1
2 1
3 1 2
4 3 2 1
5 4 2 1 3
6 4 5 1 3 2
7 4 6 1 3 2 5
8 7 6 4 3 2 5 1
9 8 6 7 3 2 5 1 4
10 9 6 7 8 2 5 1 4 3
11 10 6 7 9 2 5 1 4 3 8
12 10 11 7 9 6
5 1 4 3 8 2
13 10 12 7 9 11
5 1 4 3 8 2 6
14 10 13 7 9 11
12 1 4 3 8 2 6 5
15 10 14 7 9 11
13 1 4 3 8 2 6 5 12


Number lists are the level-order readouts of each tree.
Numbers are inserted in the following order: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

Nicholas Duchon
Sep 17, 2015