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A305503 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
159
169
1710
1811
1912
2013
2114
2215
2316
2417
2518
2619
2720
2821
2922
3023
3124
3225
3326
3427
3528
3629
3730
3831
3932
4033
4134
4235
4336
4437
4538
4639
4740

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,9,10,11,12,13,14,
 15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,
 31,32,33,34,35,36,37,38,39,40]