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A199298 as a simple table

na(n)
20
30
40
51
60
70
89
934
100
110
12710
135564
140
150
16703040
1711214400
180
190
209167628016
21293282496992
220
230
241601362631008768
25102484554971313664
260
270
283837877364995133299200
29491247174830495384679424
300
310
32128777253726458141919084341248
3332966970567472655355824573149184

[0,0,0,1,0,0,9,34,0,0,710,5564,0,0,703040,
 11214400,0,0,9167628016,293282496992,0,0,
 1601362631008768,102484554971313664,0,0,
 3837877364995133299200,491247174830495384679424,0,
 0,128777253726458141919084341248,
 32966970567472655355824573149184]