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A047333 as a simple table

na(n)
11
22
33
45
56
68
79
810
912
1013
1115
1216
1317
1419
1520
1622
1723
1824
1926
2027
2129
2230
2331
2433
2534

[1,2,3,5,6,8,9,10,12,13,15,16,17,19,20,22,23,24,
 26,27,29,30,31,33,34]