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A166337 as a simple table

na(n)
01
112
2280
35544
4102960
51847560
632449872
7561632400
89617286240
9163352435400
102756930576400
1146290177201840
12773942488394400
1312893881856650704
14214163336821292320
153547937446945842720

[1,12,280,5544,102960,1847560,32449872,561632400,
 9617286240,163352435400,2756930576400,
 46290177201840,773942488394400,12893881856650704,
 214163336821292320,3547937446945842720]