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A197648 as a simple table

na(n)
11
21
31
41
52
61
71
811
911
101
111
1231
1382
1431
151
161
1766
18342
19342
2066
211
221
23185
241649
252910
261649
27185
281
291
30595
319007
3225273
3325273
349007
35595
361
371
381760
3949381
40251972
41407810
42251972
4349381
441760
451
461
474857
48256485
492579814
507296769
517296769
522579814

[1,1,1,1,2,1,1,11,11,1,1,31,82,31,1,1,66,342,342,
 66,1,1,185,1649,2910,1649,185,1,1,595,9007,25273,
 25273,9007,595,1,1,1760,49381,251972,407810,
 251972,49381,1760,1,1,4857,256485,2579814,7296769,
 7296769,2579814]