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A108506 as a simple table

na(n)
12
23
34
48
520
638
795
8248
9263
10303
11304
12410
13438
14548
15688
161074
171575
188364
199910
2015910
2137344

[2,3,4,8,20,38,95,248,263,303,304,410,438,548,688,
 1074,1575,8364,9910,15910,37344]