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A157395 as a simple table

na(n)
11
21
35
41
515
620
71
8105
980
1060
111
12425
131200
14300
15120
161
173075
1810400
195400
20720
21120
221
2315855
24102200
2575600
2615120
27840
280
291
30123515
311149120
32907200
33241920
3420160
350
360
371
38757755
3912783680
4013426560
413719520
42362880

[1,1,5,1,15,20,1,105,80,60,1,425,1200,300,120,1,
 3075,10400,5400,720,120,1,15855,102200,75600,
 15120,840,0,1,123515,1149120,907200,241920,20160,
 0,0,1,757755,12783680,13426560,3719520,362880]