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A060406 as a simple table

na(n)
10
20
31
41
52
64
77
88
912
1013
1117
1220
1326
1428
1535
1637
1744
1848
1957
2060
2170
2273
2383
2488
25100
26104

[0,0,1,1,2,4,7,8,12,13,17,20,26,28,35,37,44,48,57,
 60,70,73,83,88,100,104]