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A278447 as a simple table

na(n)
12
24
33
43
58
64
74
812
95
105
1116
126
134
146
1510
1610
177
187
1924
208
218
2213
2313
249
258
269
2732

[2,4,3,3,8,4,4,12,5,5,16,6,4,6,10,10,7,7,24,8,8,
 13,13,9,8,9,32]