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A143966 as a simple table

na(n)
01
12
21
32
42
53
62
72
86
97
102
112
126
1314
1417
152
162
176
1814
1934
2041
212
222
236
2414
2534
2682
2799
282
292
306
3114
3234
3382
34198
35239
362
372
386
3914
4034
4182
42198
43478
44577

[1,2,1,2,2,3,2,2,6,7,2,2,6,14,17,2,2,6,14,34,41,2,
 2,6,14,34,82,99,2,2,6,14,34,82,198,239,2,2,6,14,
 34,82,198,478,577]