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A107431
as
a triangular array
3
5
4
7
4
5
9
7
5
6
11
8
7
6
3
13
10
9
A107431
as
a square array
3
5
7
9
11
13
4
4
7
8
10
5
5
7
9
6
6
3
A107431
as
an upper right triangle
3
5
7
9
11
13
4
4
7
8
10
5
5
7
9
6
6
3