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A171731 as a triangular array

0
10
120
2330
38640
515201050
83045401560
1356105105702170
211042242802101122880
341894686726303781683690
5534094515601680126063024045100

A171731 as a square array

011235813213455
0238153056104189340
0362045105224468945
0410401052806721560
0515702106301680
06211123781260
0728168630
0836240
0945
010
0
011235813213455
0238153056104189340
0362045105224468945
0410401052806721560
0515702106301680
06211123781260
0728168630
0836240
0945
010
0