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A197750 as a simple table

na(n)
11
21
31
42
57
62
73
812
912
103
115
1231
1366
1431
155
168
1779
18212
19212
2079
218
2213
23186
24921
251317
26921
27186
2813
2921
30465
314086
329499
339499
344086
35465
3621
3734
381131
3917332
4064832
41115795
4264832
4317332
441131
4534
4655
472776
4875122
49462515
501345639
511345639
52462515
5375122

[1,1,1,2,7,2,3,12,12,3,5,31,66,31,5,8,79,212,212,
 79,8,13,186,921,1317,921,186,13,21,465,4086,9499,
 9499,4086,465,21,34,1131,17332,64832,115795,64832,
 17332,1131,34,55,2776,75122,462515,1345639,
 1345639,462515,75122]