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A279402 as a simple table

na(n)
11
21
31
42
53
63
74
84
95
105
115
126
137
147
155
168
179
188
1910
2010
217
2211

[1,1,1,2,3,3,4,4,5,5,5,6,7,7,5,8,9,8,10,10,7,11]