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A026671 as a simple table

na(n)
01
13
211
343
4173
5707
62917
712111
850503
9211263
10885831
113720995
1215652239
1365913927
14277822147
151171853635
164945846997
1720884526283
1888224662549
19372827899079
201576001732485
216663706588179
2228181895551161
23119208323665543
24504329070986033
252133944799315027

[1,3,11,43,173,707,2917,12111,50503,211263,885831,
 3720995,15652239,65913927,277822147,1171853635,
 4945846997,20884526283,88224662549,372827899079,
 1576001732485,6663706588179,28181895551161,
 119208323665543,504329070986033,2133944799315027]