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A081711 as a simple table

na(n)
12
23
34
45
58
617
723
826
935
1047
1182
12100
13147
14183
15271
16492
17708
181116
191538
202491
214207
224468

[2,3,4,5,8,17,23,26,35,47,82,100,147,183,271,492,
 708,1116,1538,2491,4207,4468]