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A032974 as a simple table

na(n)
11
22
33
44
55
67
78
89
910
1012
1113
1214
1316
1417
1521
1622
1723
1825
1926
2027
2128
2230
2331
2432
2536
2637
2739
2840
2941
3043
3144
3248
3349
3450
3552
3653
3763
3864
3966
4067
4168
4270
4371
4475
4576
4677
4779
4880
4981
5082
5184
5285
5386
5490
5591
5693
5794
5895
5997
6098
61108
62109
63111

[1,2,3,4,5,7,8,9,10,12,13,14,16,17,21,22,23,25,26,
 27,28,30,31,32,36,37,39,40,41,43,44,48,49,50,52,
 53,63,64,66,67,68,70,71,75,76,77,79,80,81,82,84,
 85,86,90,91,93,94,95,97,98,108,109,111]