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A052726 as a simple table

na(n)
00
11
22
318
4216
53720
681360
72172240
868423040
92484639360
10102190636800
114695453100800
12238382331264000
1313251891094041600
14800600878273996800
1552229642780899584000
163659347096696811520000
17274040260725697449984000

[0,1,2,18,216,3720,81360,2172240,68423040,
 2484639360,102190636800,4695453100800,
 238382331264000,13251891094041600,
 800600878273996800,52229642780899584000,
 3659347096696811520000,274040260725697449984000]