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A104571
as
a triangular array
1
4
1
5
4
1
8
5
4
1
9
8
5
4
1
12
9
8
5
4
1
13
12
9
8
5
4
1
16
13
12
9
8
5
4
1
A104571
as
a square array
1
4
5
8
9
12
13
16
1
4
5
8
9
12
13
1
4
5
8
9
12
1
4
5
8
9
1
4
5
8
1
4
5
1
4
1
A104571
as
an upper right triangle
1
4
5
8
9
12
13
16
1
4
5
8
9
12
13
1
4
5
8
9
12
1
4
5
8
9
1
4
5
8
1
4
5
1
4
1