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A185259 as a simple table

na(n)
11
21
312
48
51
672
7528
8704
9180
101
11324
128760
1353792
1498124
1556160
168064
171
181344
19103040
201759520
219936360
2221676144
2319083456
246356160
25604800
261
275436
281054056
2941312704
30539233128
312901894144
327118351104
338247838464
344418632656
35988952832
3668428800
371
3821816
3910106736
40823376896
4121574613676
42235937470944
431230387808384
443281254260864
454608240745104
463390175943424
471247151098880
48204083712000
4910897286400

[1,1,12,8,1,72,528,704,180,1,324,8760,53792,98124,
 56160,8064,1,1344,103040,1759520,9936360,21676144,
 19083456,6356160,604800,1,5436,1054056,41312704,
 539233128,2901894144,7118351104,8247838464,
 4418632656,988952832,68428800,1,21816,10106736,
 823376896,21574613676,235937470944,1230387808384,
 3281254260864,4608240745104,3390175943424,
 1247151098880,204083712000,10897286400]