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A157780 as a simple table

na(n)
01
11
212
31
4240
51
61344
71
83840
91
1033792
111
125591040
131
1449152
151
1616711680
171
18104595456
191
20173015040
211
22289406976
231
2422900899840
251
26201326592
271
28116769423360
291
307689065201664
311
321095216660480
331
3451539607552
351

[1,1,12,1,240,1,1344,1,3840,1,33792,1,5591040,1,
 49152,1,16711680,1,104595456,1,173015040,1,
 289406976,1,22900899840,1,201326592,1,
 116769423360,1,7689065201664,1,1095216660480,1,
 51539607552,1]