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A266681 as a simple table

na(n)
11
21
31
41
51
62
71
81
95
106
111
121
1315
14101
1524
161
171
1859
192520
203417
21120
221
231
24257
2577830
26781497
27184881
28720
291
301
311205
322643025
33235204800
34508436767
3514216101
365040
371
381
395879
4096489721
4181044162960
421916370808311
43559048727531
441477674733
4540320

[1,1,1,1,1,2,1,1,5,6,1,1,15,101,24,1,1,59,2520,
 3417,120,1,1,257,77830,781497,184881,720,1,1,1205,
 2643025,235204800,508436767,14216101,5040,1,1,
 5879,96489721,81044162960,1916370808311,
 559048727531,1477674733,40320]