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A156881 as a simple table

na(n)
01
11
21
31
41
52
61
71
83
96
101
111
127
1321
1424
151
161
1713
18301
19315
20120
211
221
2321
242041
2577959
269765
27720
281
291
3031
318841
323847285
33121226245
34615195
355040
361
371
3843
3928861
4074450061
4187029433985
421131162092095
4378129765
4440320
451
461
4757
4877701
49806116591
5012538953723681
5123624400943530205
5263330372050122765
5319923090075
54362880

[1,1,1,1,1,2,1,1,3,6,1,1,7,21,24,1,1,13,301,315,
 120,1,1,21,2041,77959,9765,720,1,1,31,8841,
 3847285,121226245,615195,5040,1,1,43,28861,
 74450061,87029433985,1131162092095,78129765,40320,
 1,1,57,77701,806116591,12538953723681,
 23624400943530205,63330372050122765,19923090075,
 362880]