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A033597 as a simple table

na(n)
44
55
66
78
89
99
109
1110
1212
1314
1415
1515
1615
1716
1818
1920
2021
2121
2221
2324
2426
2526
2626
2726
2826
2927
3030
3133
3234
3334
3434
3534
3634
3736
3839
3939
4039
4140
4242
4344
4445
4545
4645
4748
4850
4950
5050
5150
5250
5353
5456
5556
5656
5756
5856
5957
6060

[4,5,6,8,9,9,9,10,12,14,15,15,15,16,18,20,21,21,
 21,24,26,26,26,26,26,27,30,33,34,34,34,34,34,36,
 39,39,39,40,42,44,45,45,45,48,50,50,50,50,50,53,
 56,56,56,56,56,57,60]