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A080220 as a simple table

na(n)
12
23
35
46
57
68
711
812
913
1014
1117
1218
1319
1420
1521
1622
1723
1824
1929
2030
2131
2232
2337
2438
2539
2640
2741
2842
2943
3044
3147
3248
3349
3450
3551
3652
3753
3854
3955
4056
4159
4260
4361
4462
4563
4664
4767
4868
4969
5070
5171
5272
5373
5474
5575
5676
5777
5878
5979
6080
6183
6284
6385
6486
6587
6688
6789
6890
6991
7092
7197

[2,3,5,6,7,8,11,12,13,14,17,18,19,20,21,22,23,24,
 29,30,31,32,37,38,39,40,41,42,43,44,47,48,49,50,
 51,52,53,54,55,56,59,60,61,62,63,64,67,68,69,70,
 71,72,73,74,75,76,77,78,79,80,83,84,85,86,87,88,
 89,90,91,92,97]