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A047600 as a simple table

na(n)
11
23
34
45
59
611
712
813
917
1019
1120
1221
1325
1427
1528
1629
1733
1835
1936
2037
2141
2243
2344
2445
2549
2651
2752
2853
2957
3059
3160
3261
3365
3467
3568
3669
3773
3875
3976
4077
4181
4283
4384
4485
4589
4691
4792
4893
4997
5099
51100
52101
53105
54107
55108
56109
57113
58115
59116
60117
61121
62123
63124

[1,3,4,5,9,11,12,13,17,19,20,21,25,27,28,29,33,35,
 36,37,41,43,44,45,49,51,52,53,57,59,60,61,65,67,
 68,69,73,75,76,77,81,83,84,85,89,91,92,93,97,99,
 100,101,105,107,108,109,113,115,116,117,121,123,
 124]