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A249700 as a simple table

na(n)
01
11
21
372
41
514400
61
71270080
81
987091200
101
115269017600
121
13203997201408000
141
1515692092416000
161
172902409413263360000
181
191747310222272462848000
201
21337200218333282304000000
221
237135156619932253552640000
241
251016294482039046201671680000000

[1,1,1,72,1,14400,1,1270080,1,87091200,1,
 5269017600,1,203997201408000,1,15692092416000,1,
 2902409413263360000,1,1747310222272462848000,1,
 337200218333282304000000,1,
 7135156619932253552640000,1,
 1016294482039046201671680000000]