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A066991 as a triangular array

1
12
1126
112036024
116806048020160120
13024019958400798336001814400720
1665280108972864008717829120002179457280002395008005040
117297280889218570240020274183401472000

A066991 as a square array

11111111
21212016803024066528017297280
63606048019958400108972864008892185702400
24201607983360087178291200020274183401472000
1201814400217945728000
720239500800
5040
11111111
21212016803024066528017297280
63606048019958400108972864008892185702400
24201607983360087178291200020274183401472000
1201814400217945728000
720239500800
5040