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A047417 as a simple table

na(n)
12
23
34
46
510
611
712
814
918
1019
1120
1222
1326
1427
1528
1630
1734
1835
1936
2038
2142
2243
2344
2446
2550
2651
2752
2854
2958
3059
3160
3262
3366
3467
3568
3670
3774
3875
3976
4078
4182
4283
4384
4486
4590
4691
4792
4894
4998
5099
51100
52102
53106
54107
55108
56110
57114
58115
59116
60118
61122
62123

[2,3,4,6,10,11,12,14,18,19,20,22,26,27,28,30,34,
 35,36,38,42,43,44,46,50,51,52,54,58,59,60,62,66,
 67,68,70,74,75,76,78,82,83,84,86,90,91,92,94,98,
 99,100,102,106,107,108,110,114,115,116,118,122,
 123]