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A123554 as a simple table

na(n)
11
21
32
41
51
66
715
820
915
106
111
121
1312
1466
15220
16495
17792
18924
19792
20495
21220
2266
2312
241
251
2620
27190
281140
294845
3015504
3138760
3277520
33125970
34167960
35184756
36167960
37125970
3877520
3938760
4015504
414845
421140
43190
4420
451
461
4730
48435
494060
5027405
51142506
52593775

[1,1,2,1,1,6,15,20,15,6,1,1,12,66,220,495,792,924,
 792,495,220,66,12,1,1,20,190,1140,4845,15504,
 38760,77520,125970,167960,184756,167960,125970,
 77520,38760,15504,4845,1140,190,20,1,1,30,435,
 4060,27405,142506,593775]