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A134991 as a simple table

na(n)
11
21
33
41
510
615
71
825
9105
10105
111
1256
13490
141260
15945
161
17119
181918
199450
2017325
2110395
221
23246
246825
2556980
26190575
27270270
28135135
291
30501
3122935
32302995
331636635
344099095
354729725
362027025
371
381012
3974316
401487200
4112122110
4247507460
4394594500
4491891800
4534459425

[1,1,3,1,10,15,1,25,105,105,1,56,490,1260,945,1,
 119,1918,9450,17325,10395,1,246,6825,56980,190575,
 270270,135135,1,501,22935,302995,1636635,4099095,
 4729725,2027025,1,1012,74316,1487200,12122110,
 47507460,94594500,91891800,34459425]