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A084154 as a simple table

na(n)
00
11
22
310
432
5116
6392
71352
84608
915760
1053792
11183712
12627200
132141504
147311488
1524963200
1685229568
17290992384
18993509888
193392055808
2011581202432
2139540700160
22135000393728
23460920178688
241573679923200
255372879343616

[0,1,2,10,32,116,392,1352,4608,15760,53792,183712,
 627200,2141504,7311488,24963200,85229568,
 290992384,993509888,3392055808,11581202432,
 39540700160,135000393728,460920178688,
 1573679923200,5372879343616]