Use as a Tree:
Finding your parents/children
1
4
5
6
9
10
13
17
18
19
20
21
22
30
25
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
The children
of node j are
at 2j+1 and
2j+2.
The parent of
node j is
floor((j-1)/2).