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A231335 as a simple table

na(n)
01
11
22
32
43
53
63
74
83
93
105
114
123
134
146
154
165
174
185
196
205
214
226
237
244
255

[1,1,2,2,3,3,3,4,3,3,5,4,3,4,6,4,5,4,5,6,5,4,6,7,
 4,5]