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A139407 as a simple table

na(n)
12
25
38
420
538
647
762
880
992
10107
11110
12113
13185
14197
15233
16260
17275
18293
19317
20332
21335
22338
23377
24395
25398
26488
27500
28653
29668
30722
31740
32755
33818
34863
35905
36950
37962
38965
391052
401055
411067
421097
431100
441193
451202
461217
471223
481235
491262
501280
511283

[2,5,8,20,38,47,62,80,92,107,110,113,185,197,233,
 260,275,293,317,332,335,338,377,395,398,488,500,
 653,668,722,740,755,818,863,905,950,962,965,1052,
 1055,1067,1097,1100,1193,1202,1217,1223,1235,1262,
 1280,1283]