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A131255 as a triangular array

1
01
011
1021
01131
011341
1022651
011351061
01135111571
1022610212181

A131255 as a square array

1001001001
110110110
12112112
1332332
146556
15101110
161521
1721
18
1
1001001001
110110110
12112112
1332332
146556
15101110
161521
1721
18
1