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A017981 as a simple table

na(n)
01
12
22
32
43
54
64
76
87
98
1011
1113
1216
1321
1426
1532
1641
1751
1864
1981
20102
21128
22162
23204
24256
25323
26407
27512
28646
29813
301024
311291
321626
332048
342581
353251
364096
375161
386502
398192
4010322
4113004
4216384
4320643
4426008
4532768
4641286
4752016
4865536
4982571
50104032

[1,2,2,2,3,4,4,6,7,8,11,13,16,21,26,32,41,51,64,
 81,102,128,162,204,256,323,407,512,646,813,1024,
 1291,1626,2048,2581,3251,4096,5161,6502,8192,
 10322,13004,16384,20643,26008,32768,41286,52016,
 65536,82571,104032]