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A284731 as a triangular array

1
11
121
1551
11433141
142234238421
11321706414617821321

A284731 as a square array

1111111
1251442132
15332341706
1142384146
1421782
1132
1
1111111
1251442132
15332341706
1142384146
1421782
1132
1