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A182918 as a simple table

na(n)
01
12
26
31
4120
51
61512
71
817280
91
10190080
111
121415232000
131
1421772800
151
16829108224000
171
18105082151731200
191
204345502515200000
211
2219989311569920000
231
24626378114550988800000
251
2617896517558599680000
271
28944578196742891110400000

[1,2,6,1,120,1,1512,1,17280,1,190080,1,1415232000,
 1,21772800,1,829108224000,1,105082151731200,1,
 4345502515200000,1,19989311569920000,1,
 626378114550988800000,1,17896517558599680000,1,
 944578196742891110400000]