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A047337 as a simple table

na(n)
10
21
32
43
54
67
78
89
910
1011
1114
1215
1316
1417
1518
1621
1722
1823
1924
2025
2128
2229
2330
2431
2532
2635
2736
2837
2938
3039
3142
3243
3344
3445
3546
3649
3750
3851
3952
4053
4156
4257
4358
4459
4560
4663
4764
4865
4966
5067
5170
5271
5372
5473
5574
5677
5778

[0,1,2,3,4,7,8,9,10,11,14,15,16,17,18,21,22,23,24,
 25,28,29,30,31,32,35,36,37,38,39,42,43,44,45,46,
 49,50,51,52,53,56,57,58,59,60,63,64,65,66,67,70,
 71,72,73,74,77,78]