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A084857 as a simple table

na(n)
00
11
210
348
4176
5560
61632
74480
811776
929952
1074240
11180224
12430080
131011712
142351104
155406720
1612320768
1727852800
1862521344
19139460608
20309329920
21682622976
221499463680
233279945728
247147094016
2515518924800
2633587986432

[0,1,10,48,176,560,1632,4480,11776,29952,74240,
 180224,430080,1011712,2351104,5406720,12320768,
 27852800,62521344,139460608,309329920,682622976,
 1499463680,3279945728,7147094016,15518924800,
 33587986432]