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A166972 as a triangular array

1
11
1101
183411
166811101221
153492598282103091
142798572367432328447157141
13423911227649520154955463578720268915611
1273913626020313287985717040210093038001292815680

A166972 as a square array

111111111
110836685349427983423912739136
14111102598257236712276495260203132
1122821043232820154955879857170
1309447154635787402100930
171420268938001292
11561815680
1
111111111
110836685349427983423912739136
14111102598257236712276495260203132
1122821043232820154955879857170
1309447154635787402100930
171420268938001292
11561815680
1