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A178993 as a simple table

na(n)
11
22
33
44
54
66
77
87
98
108
116
1212
1312
1413
1515
1616
1716
1818
1918
2019
2117
2216
2320
2421
2518
2621
2725
2823
2926
3030
3130
3231
3328
3432
3534
3634
3736
3836
3938
4038
4139
4241
4341
4443
4543
4643
4742
4845
4941
5048
5146
5248
5350
5445
5552
5655
5755
5854
5948
6060
6156
6261
6356
6460
6564
6664
6766
6866
6961
7067
7166
7266
7368
7472
7566
7667
7776
7876
7972
8073

[1,2,3,4,4,6,7,7,8,8,6,12,12,13,15,16,16,18,18,19,
 17,16,20,21,18,21,25,23,26,30,30,31,28,32,34,34,
 36,36,38,38,39,41,41,43,43,43,42,45,41,48,46,48,
 50,45,52,55,55,54,48,60,56,61,56,60,64,64,66,66,
 61,67,66,66,68,72,66,67,76,76,72,73]