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A197896 as a simple table

na(n)
11
21
31
42
57
62
73
812
912
103
115
1231
1350
1431
155
168
1779
18180
19180
2079
218
2213
23186
24745
251141
26745
27186
2813
2921
30465
313046
327589
337589
343046
35465
3621
3734
381131
3912531
4046988
4182343
4246988
4312531
441131
4534
4655
472776
4852188
49307547
50821491
51821491
52307547
5352188

[1,1,1,2,7,2,3,12,12,3,5,31,50,31,5,8,79,180,180,
 79,8,13,186,745,1141,745,186,13,21,465,3046,7589,
 7589,3046,465,21,34,1131,12531,46988,82343,46988,
 12531,1131,34,55,2776,52188,307547,821491,821491,
 307547,52188]