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A047997 as a simple table

na(n)
11
21
32
41
53
65
71
84
98
1012
111
125
1313
1424
1532
161
176
1818
1943
2073
2194
221
237
2425
2569
26141
27227
28289
291
308
3132
32104
33252
34480
35734
36910
371
389
3941
40150
41414
42920
431656
442430
452934
461
4710
4850
49207
50649
511636
523370
535744
548150
559686
561
5711
5861
59277
60967

[1,1,2,1,3,5,1,4,8,12,1,5,13,24,32,1,6,18,43,73,
 94,1,7,25,69,141,227,289,1,8,32,104,252,480,734,
 910,1,9,41,150,414,920,1656,2430,2934,1,10,50,207,
 649,1636,3370,5744,8150,9686,1,11,61,277,967]