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A197235 as a simple table

na(n)
11
21
31
42
57
62
73
812
912
103
115
1231
1355
1431
155
168
1779
18242
19242
2079
218
2213
23186
241178
252117
261178
27186
2813
2921
30465
315355
3217759
3317759
345355
35465
3621
3734
381131
3924723
40141210
41249929
42141210
4324723
441131
4534
4655
472776
48116440
491207249
503710070
513710070

[1,1,1,2,7,2,3,12,12,3,5,31,55,31,5,8,79,242,242,
 79,8,13,186,1178,2117,1178,186,13,21,465,5355,
 17759,17759,5355,465,21,34,1131,24723,141210,
 249929,141210,24723,1131,34,55,2776,116440,
 1207249,3710070,3710070]