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A067118 as a simple table

na(n)
12
23
34
46
58
68
710
811
913
1014
1116
1217
1319
1420
1522
1623
1725
1826
1928
2029
2131
2232
2334
2435
2537
2638
2740
2841
2943
3044
3146
3247
3349
3450
3552
3653
3755
3856
3958
4059
4160
4262
4363
4465
4566
4668
4769
4871
4972
5074
5175
5276
5378
5479
5581
5682
5784
5885
5986
6088
6189
6291
6392
6494
6595
6697
6798
68100
69101
70103

[2,3,4,6,8,8,10,11,13,14,16,17,19,20,22,23,25,26,
 28,29,31,32,34,35,37,38,40,41,43,44,46,47,49,50,
 52,53,55,56,58,59,60,62,63,65,66,68,69,71,72,74,
 75,76,78,79,81,82,84,85,86,88,89,91,92,94,95,97,
 98,100,101,103]