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A137859 as a simple table

na(n)
15
26
39
411
516
620
732
830
942
1042
1149
1258
1376
1477
1575
1682
1790
1891
1999
20107
21125
22151
23151
24145
25165
26189
27168
28189
29194
30211
31241
32244
33246
34259
35262
36290
37304
38300
39311
40314

[5,6,9,11,16,20,32,30,42,42,49,58,76,77,75,82,90,
 91,99,107,125,151,151,145,165,189,168,189,194,211,
 241,244,246,259,262,290,304,300,311,314]