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A028765 as a simple table

na(n)
12
23
35
46
57
68
710
811
914
1015
1118
1219
1320
1421
1522
1623
1724
1826
1927
2028
2130
2231
2332
2433
2534
2635
2737
2838
2939
3041
3142
3243
3344
3445
3546
3647
3750
3851

[2,3,5,6,7,8,10,11,14,15,18,19,20,21,22,23,24,26,
 27,28,30,31,32,33,34,35,37,38,39,41,42,43,44,45,
 46,47,50,51]