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A306574 as a simple table

na(n)
12
23
34
44
55
64
75
86
94
105
116
125
137
145
155
166
176
187
196
206
218
226
236
246

[2,3,4,4,5,4,5,6,4,5,6,5,7,5,5,6,6,7,6,6,8,6,6,6]