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A330239 as a simple table

na(n)
10
20
31
42
53
64
73
84
95
106
115
126
137
148
157
168
179
1810
199
2010
2111
2212
2311
2412
2513
2614
2715
2814
2915
3016
3115
3216
3317
3418
3517
3618

[0,0,1,2,3,4,3,4,5,6,5,6,7,8,7,8,9,10,9,10,11,12,
 11,12,13,14,15,14,15,16,15,16,17,18,17,18]