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A116631 as a simple table

na(n)
11
27
38743
450239
5312389
68789977
787453889
896301009
93963715129
105062673539
116854133309107
1216987071590111
1372278468169733
14411419589731633
15590475819370933

[1,7,8743,50239,312389,8789977,87453889,96301009,
 3963715129,5062673539,6854133309107,
 16987071590111,72278468169733,411419589731633,
 590475819370933]