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A049218 as a triangular array

1
01
-201
0-801
240-2001
01840-4001
-72007840-7001
0-8448024640-11201
403200-52352063840-16801
06485760-2297600144480-24001
-3628800053602560-8043200295680-33001

A049218 as a square array

10-20240-7200403200-3628800
10-801840-844806485760
10-2007840-5235205360256
10-40024640-2297600
10-70063840-804320
10-1120144480
10-168029568
10-2400
10-330
10
1
10-20240-7200403200-3628800
10-801840-844806485760
10-2007840-5235205360256
10-40024640-2297600
10-70063840-804320
10-1120144480
10-168029568
10-2400
10-330
10
1