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A047447 as a simple table

na(n)
12
23
35
46
510
611
713
814
918
1019
1121
1222
1326
1427
1529
1630
1734
1835
1937
2038
2142
2243
2345
2446
2550
2651
2753
2854
2958
3059
3161
3262
3366
3467
3569
3670
3774
3875
3977
4078
4182
4283
4385
4486
4590
4691
4793
4894
4998
5099
51101
52102
53106
54107
55109
56110
57114
58115
59117
60118
61122
62123

[2,3,5,6,10,11,13,14,18,19,21,22,26,27,29,30,34,
 35,37,38,42,43,45,46,50,51,53,54,58,59,61,62,66,
 67,69,70,74,75,77,78,82,83,85,86,90,91,93,94,98,
 99,101,102,106,107,109,110,114,115,117,118,122,
 123]