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A288927 as a simple table

na(n)
12
23
34
45
57
68
79
812
913
1014
1116
1217
1318
1420
1521
1622
1724
1825
1926
2029
2130
2231
2332
2433
2534
2637
2738
2839
2941
3042
3143
3246
3347
3448
3550
3651
3752
3853
3955
4056
4157
4260
4361
4462
4564
4665
4766
4867
4969
5070
5171
5274
5375
5476
5578
5679
5780
5881
5983
6084
6185
6288
6389
6490
6591
6692

[2,3,4,5,7,8,9,12,13,14,16,17,18,20,21,22,24,25,
 26,29,30,31,32,33,34,37,38,39,41,42,43,46,47,48,
 50,51,52,53,55,56,57,60,61,62,64,65,66,67,69,70,
 71,74,75,76,78,79,80,81,83,84,85,88,89,90,91,92]