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A111688 as a simple table

na(n)
12
24
35
46
57
68
711
812
913
1014
1117
1218
1319
1420
1523
1624
1729
1830
1931
2032
2137
2238
2341
2442
2543
2644
2747
2848
2953
3054
3159
3260
3361
3462
3567
3668
3771
3872
3973
4074
4179
4280
4383
4484
4589
4690
4797
4898
49101
50102
51103
52104
53107
54108
55109
56110

[2,4,5,6,7,8,11,12,13,14,17,18,19,20,23,24,29,30,
 31,32,37,38,41,42,43,44,47,48,53,54,59,60,61,62,
 67,68,71,72,73,74,79,80,83,84,89,90,97,98,101,102,
 103,104,107,108,109,110]