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A138464 as a simple table

na(n)
11
21
31
41
53
63
71
86
915
1016
111
1210
1345
14110
15125
161
1715
18105
19435
201080
211296
221
2321
24210
251295
265250
2713377
2816807
291
3028
31378
323220
3318865
3476608
35200704
36262144
371
3836
39630
407056
4155755
42320544
431316574
443542940
454782969
461
4745
48990
4914070
50143325
511092105
526258000
5326100000
5472000000
55100000000

[1,1,1,1,3,3,1,6,15,16,1,10,45,110,125,1,15,105,
 435,1080,1296,1,21,210,1295,5250,13377,16807,1,28,
 378,3220,18865,76608,200704,262144,1,36,630,7056,
 55755,320544,1316574,3542940,4782969,1,45,990,
 14070,143325,1092105,6258000,26100000,72000000,
 100000000]