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A081569 as a simple table

na(n)
01
15
226
3139
4757
54172
623165
7129217
8722818
94050239
1022718609
11127512940
12715962889
134020920141
1422584986378
15126867394723
16712691811325
174003745802188
1822492567804517
19126361939999081
20709898671705906
213988211185370615
2222405825905923321
23125876420631268204

[1,5,26,139,757,4172,23165,129217,722818,4050239,
 22718609,127512940,715962889,4020920141,
 22584986378,126867394723,712691811325,
 4003745802188,22492567804517,126361939999081,
 709898671705906,3988211185370615,
 22405825905923321,125876420631268204]