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A157384 as a simple table

na(n)
11
21
34
41
512
620
71
872
980
10120
111
12280
131000
14600
15840
161
171740
189200
199000
205040
216720
221
238484
2479100
25138600
2688200
2747040
2860480
291
3057232
31874720
321789200
331552320
34940800
35483840
36604800
371
38328752
399532880

[1,1,4,1,12,20,1,72,80,120,1,280,1000,600,840,1,
 1740,9200,9000,5040,6720,1,8484,79100,138600,
 88200,47040,60480,1,57232,874720,1789200,1552320,
 940800,483840,604800,1,328752,9532880]