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A309947 as a simple table

na(n)
10
21
33
43
55
66
78
89
97
1010
1111
1213
1312
1414
1515
1616
1717
1816
1921
2020
2121
2215
2321
2423
2520
2625
2727
2824
2924
3028
3128
3223
3332
3436
3529
3633
3733
3833
3935
4027
4137
4236
4338
4438
4543
4633
4743
4842
4943
5040
5129
5248
5343
5431
5551
5644
5753
5838
5952
6047
6157
6247
6335
6457
6548
6648
6766
6855
6957

[0,1,3,3,5,6,8,9,7,10,11,13,12,14,15,16,17,16,21,
 20,21,15,21,23,20,25,27,24,24,28,28,23,32,36,29,
 33,33,33,35,27,37,36,38,38,43,33,43,42,43,40,29,
 48,43,31,51,44,53,38,52,47,57,47,35,57,48,48,66,
 55,57]