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A129816 as a simple table

na(n)
12
25
36
47
58
611
712
813
915
1017
1118
1220
1322
1424
1527
1628
1731
1832
1933
2037
2139
2240
2341
2442
2545
2648
2750
2851
2952
3054
3155
3256
3357
3459
3560
3661
3763
3869
3970
4071
4172
4273
4374
4476
4579
4680
4784
4887
4988
5089
5190
5291
5393
5496
5597
5698
5799
58101
59102
60104
61105
62107
63108
64111
65112
66114
67116
68120

[2,5,6,7,8,11,12,13,15,17,18,20,22,24,27,28,31,32,
 33,37,39,40,41,42,45,48,50,51,52,54,55,56,57,59,
 60,61,63,69,70,71,72,73,74,76,79,80,84,87,88,89,
 90,91,93,96,97,98,99,101,102,104,105,107,108,111,
 112,114,116,120]