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A007989 as a simple table

na(n)
02
13
25
36
47
58
69
711
813
914
1017
1118
1219
1320
1421
1522
1623
1724
1825
1926
2027
2128
2229
2330
2431
2532
2633
2737
2841
2942
3043
3144
3247
3349
3453
3554
3655
3758
3859
3961
4065
4166
4267
4368
4469
4570
4671
4773
4875
4976
5077
5179
5283
5385
5487
5588
5689
5791
5895
5996
6097
6198
62101
63103
64107
65109

[2,3,5,6,7,8,9,11,13,14,17,18,19,20,21,22,23,24,
 25,26,27,28,29,30,31,32,33,37,41,42,43,44,47,49,
 53,54,55,58,59,61,65,66,67,68,69,70,71,73,75,76,
 77,79,83,85,87,88,89,91,95,96,97,98,101,103,107,
 109]