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A000431 as a simple table

na(n)
00
10
20
32
416
588
6416
71824
87680
931616
10128512
11518656
122084864
138361984
1433497088
15134094848
16536608768
172146926592
188588754944
1934357248000
20137433710592
21549744803840
222199000186880
238796044787712
2435184271425536
25140737278640128
26562949517213696

[0,0,0,2,16,88,416,1824,7680,31616,128512,518656,
 2084864,8361984,33497088,134094848,536608768,
 2146926592,8588754944,34357248000,137433710592,
 549744803840,2199000186880,8796044787712,
 35184271425536,140737278640128,562949517213696]