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A318397 as a triangular array

1
21
681
2054181
70320216321
25217502000600501
92490721575080001350721
34324527611113285750245002646981
128702196487244167902723430006272047041281
486201042470444787265197444000752111132014112077761621

A318397 as a square array

126207025292434321287048620
185432017509072452762196481042470
1182162000157501111327244164447872
1326008000857507902726519744
1501350245003430004000752
1722646627201111320
1984704141120
11287776
1162
1
126207025292434321287048620
185432017509072452762196481042470
1182162000157501111327244164447872
1326008000857507902726519744
1501350245003430004000752
1722646627201111320
1984704141120
11287776
1162
1