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A066040
as
a triangular array
1
2
1
2
3
1
2
3
4
1
2
4
4
5
1
3
5
7
6
6
1
3
6
10
10
8
7
1
3
7
11
17
16
10
8
1
A066040
as
a square array
1
2
2
2
2
3
3
3
1
3
3
4
5
6
7
1
4
4
7
10
11
1
5
6
10
17
1
6
8
16
1
7
10
1
8
1
A066040
as
an upper right triangle
1
2
2
2
2
3
3
3
1
3
3
4
5
6
7
1
4
4
7
10
11
1
5
6
10
17
1
6
8
16
1
7
10
1
8
1