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A054521
as a triangular array
1
1
0
1
1
0
1
0
1
0
1
1
1
1
0
1
0
0
0
1
0
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
1
0
1
1
0
1
1
0
1
0
1
0
0
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
0
1
0
0
0
1
0
1
0
0
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
A054521
as a square array
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
0
1
1
1
0
1
0
0
0
1
0
1
0
1
1
1
1
1
1
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
0
1
0
A054521
as an upper right triangle
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
0
1
1
1
0
1
0
0
0
1
0
1
0
1
1
1
1
1
1
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
0
1
0
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Last modified May 18 18:37 EDT 2024. Contains 372664 sequences. (Running on oeis4.)
