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A157640 as a triangular array

1
11
181
139391
11607801601
160512100121006051
1218416516567760016516521841
1765120887233240198532401985208872376511
1262402509528014053356805313925540140533568025095280

A157640 as a square array

111111111
18391606052184765126240
13978012100165165208872325095280
116012100677600324019851405335680
1605165165324019855313925540
1218420887231405335680
1765125095280
1
111111111
18391606052184765126240
13978012100165165208872325095280
116012100677600324019851405335680
1605165165324019855313925540
1218420887231405335680
1765125095280
1