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A175084 as a simple table

na(n)
11
22
33
45
56
67
78
810
911
1012
1113
1214
1315
1416
1517
1618
1719
1820
1921
2022
2123
2224
2326
2427
2528
2629
2730
2831
2933
3034
3135
3237
3338
3439
3540
3641
3742
3843
3944
4045
4146
4247
4348
4450
4551
4652
4753
4854
4955
5056
5157
5258
5359
5460
5561
5662
5763
5864
5965
6066
6167
6268
6369
6470
6571
6672
6773
6874
6975
7076
7177
7278

[1,2,3,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20,
 21,22,23,24,26,27,28,29,30,31,33,34,35,37,38,39,
 40,41,42,43,44,45,46,47,48,50,51,52,53,54,55,56,
 57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,
 73,74,75,76,77,78]