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A019538 as a triangular array

1
12
166
1143624
130150240120
16254015601800720
11261806840016800151205040
125457964082412600019152014112040320
151018150186480834120190512023284801451520362880
1102255980

A019538 as a square array

1111111111
261430621262545101022
636150540180657961815055980
242401560840040824186480
120180016800126000834120
720151201915201905120
50401411202328480
403201451520
362880

A019538 as an upper right triangle

1111111111
261430621262545101022
636150540180657961815055980
242401560840040824186480
120180016800126000834120
720151201915201905120
50401411202328480
403201451520
362880

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Last modified December 22 10:11 EST 2014. Contains 252339 sequences.