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A018075 as a simple table

na(n)
01
11
23
36
411
520
636
766
8121
9220
10401
11730
121331
132423
144414
158039
1614641
1726663
1848558
1988433
20161051
21293299
22534145
23972765
241771561
253226296
265875603
2710700415
2819487171
2935489261
3064631634
31117704565

[1,1,3,6,11,20,36,66,121,220,401,730,1331,2423,
 4414,8039,14641,26663,48558,88433,161051,293299,
 534145,972765,1771561,3226296,5875603,10700415,
 19487171,35489261,64631634,117704565]