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A091771 as a simple table

na(n)
02
13
27
343
4173
53461
662299
76977489
855819913
98038067473
10241142024191
1115915373596607
122291813797911409
13476697269965573073
1420021285338554069067
1510811494082819197296181
164670565443777893231950193

[2,3,7,43,173,3461,62299,6977489,55819913,
 8038067473,241142024191,15915373596607,
 2291813797911409,476697269965573073,
 20021285338554069067,10811494082819197296181,
 4670565443777893231950193]