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A081720 as a simple table

na(n)
11
21
33
41
54
610
71
86
921
1055
111
128
1339
14136
15377
161
1713
1892
19430
201505
214291
221
2318
24198
251300
265895
2720646
2860028
291
3030
31498
324435
3325395
34107331
35365260
361058058
371
3846
391219
4015084
41110085
42563786
432250311
447472984
4521552969
461
4778
483210
4953764
50493131
513037314

[1,1,3,1,4,10,1,6,21,55,1,8,39,136,377,1,13,92,
 430,1505,4291,1,18,198,1300,5895,20646,60028,1,30,
 498,4435,25395,107331,365260,1058058,1,46,1219,
 15084,110085,563786,2250311,7472984,21552969,1,78,
 3210,53764,493131,3037314]