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A105098 as a simple table

na(n)
10
20
30
41
51
62
72
82
93
104
114
125
135
146
156
167
177
188
198
209
2110
2210
2311
2411
2512
2612
2713
2813
2914
3015
3115
3216
3316
3417
3517
3618
3718
3819
3920
4020

[0,0,0,1,1,2,2,2,3,4,4,5,5,6,6,7,7,8,8,9,10,10,11,
 11,12,12,13,13,14,15,15,16,16,17,17,18,18,19,20,
 20]