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A284941 as a simple table

na(n)
12
23
34
46
57
68
710
811
912
1014
1116
1217
1318
1420
1521
1622
1724
1825
1926
2028
2130
2231
2332
2434
2535
2636
2738
2839
2940
3042
3144
3245
3346
3448
3550
3651
3752
3854
3955
4056
4158
4259
4360
4462
4564
4665
4766
4868
4969
5070
5172
5273
5374
5476
5578
5679
5780
5882
5983
6084
6186
6287
6388
6490
6592
6693

[2,3,4,6,7,8,10,11,12,14,16,17,18,20,21,22,24,25,
 26,28,30,31,32,34,35,36,38,39,40,42,44,45,46,48,
 50,51,52,54,55,56,58,59,60,62,64,65,66,68,69,70,
 72,73,74,76,78,79,80,82,83,84,86,87,88,90,92,93]