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A174787 as a simple table

na(n)
11
21
31
42
52
64
74
86
97
109
119
1213
1313
1415
1517
1621
1721
1825
1925
2029
2131
2233
2333
2443
2544
2646
2748
2852
2952
3058
3158
3266
3368
3470
3572
3685
3785
3887
3989
4099
4199
42105
43105
44109
45113
46115
47115
48139
49140
50144
51146
52150
53150
54160
55162
56172
57174
58176
59176
60198
61198
62200
63204
64220
65222

[1,1,1,2,2,4,4,6,7,9,9,13,13,15,17,21,21,25,25,29,
 31,33,33,43,44,46,48,52,52,58,58,66,68,70,72,85,
 85,87,89,99,99,105,105,109,113,115,115,139,140,
 144,146,150,150,160,162,172,174,176,176,198,198,
 200,204,220,222]