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A278591 as a simple table

na(n)
12
23
35
47
58
611
714
818
925
1039
1181
1291
13347
14391
15438
16464
17539
18818
191051
201125
211598
223384
2311966
2479867
25147313

[2,3,5,7,8,11,14,18,25,39,81,91,347,391,438,464,
 539,818,1051,1125,1598,3384,11966,79867,147313]