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A342880
as
a triangular array
1
2
2
3
4
5
4
9
15
8
5
30
A342880
as
a square array
1
2
3
4
5
2
4
9
30
5
15
8
A342880
as
an upper right triangle
1
2
3
4
5
2
4
9
30
5
15
8
