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A012263 as a simple table

na(n)
01
11
21
35
417
5129
6769
77797
866849
9848481
109506241
11145041093
122007271089
1335799178401
14589807203777
1512045448529397
16230194642564161
175298881528389185
18115219444193968257
192952169020073027845

[1,1,1,5,17,129,769,7797,66849,848481,9506241,
 145041093,2007271089,35799178401,589807203777,
 12045448529397,230194642564161,5298881528389185,
 115219444193968257,2952169020073027845]