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A155868 as a simple table

na(n)
01
11
21
31
41
51
61
76
86
91
101
1136
12121
1336
141
151
16240
171750
181750
19240
201
211
221800
2323290
2450625
2523290
261800
271
281
2915120
30308700
311193640
321193640
33308700
3415120
351
361
37141120
384207896
3925738720
4045819361
4125738720
424207896
43141120
441
451
461451520
4759832864
48535810464
491510458516
501510458516
51535810464
5259832864
531451520
541

[1,1,1,1,1,1,1,6,6,1,1,36,121,36,1,1,240,1750,
 1750,240,1,1,1800,23290,50625,23290,1800,1,1,
 15120,308700,1193640,1193640,308700,15120,1,1,
 141120,4207896,25738720,45819361,25738720,4207896,
 141120,1,1,1451520,59832864,535810464,1510458516,
 1510458516,535810464,59832864,1451520,1]