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A074464 as a simple table

na(n)
12
23
35
47
52
64
75
82
93
108
112
123
132
144
154
161
173
183
193
203
218
225
231
245
252
263
275
284
291
303
313
326
335
345
355
364
373
385
394
403
413
425
433
444
455
463
473

[2,3,5,7,2,4,5,2,3,8,2,3,2,4,4,1,3,3,3,3,8,5,1,5,
 2,3,5,4,1,3,3,6,5,5,5,4,3,5,4,3,3,5,3,4,5,3,3]