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A143777
as
a triangular array
1
1
1
1
4
2
1
13
26
7
1
40
260
280
47
1
121
2420
8470
5687
628
A143777
as
a square array
1
1
1
1
1
1
1
4
13
40
121
2
26
260
2420
7
280
8470
47
5687
628
A143777
as
an upper right triangle
1
1
1
1
1
1
1
4
13
40
121
2
26
260
2420
7
280
8470
47
5687
628