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A227830 as a simple table

na(n)
01
12
212
31
4720
51
630240
71
81209600
91
1047900160
111
121307674368000
131
1474724249600
151
1610670622842880000
171
185109094217170944000
191
20802857662698291200000
211
2214101100039391805440000
231
241693824136731743669452800000
251
26186134520519971831808000000
271
2837893265687455865519472640000000
291
30759790291646040068357842010112000000
311

[1,2,12,1,720,1,30240,1,1209600,1,47900160,1,
 1307674368000,1,74724249600,1,10670622842880000,1,
 5109094217170944000,1,802857662698291200000,1,
 14101100039391805440000,1,
 1693824136731743669452800000,1,
 186134520519971831808000000,1,
 37893265687455865519472640000000,1,
 759790291646040068357842010112000000,1]