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A363759 as a simple table

na(n)
15
217
34097
41048577
51073741825
64398046511105
772057594037927937
84722366482869645213697
91237940039285380274899124225
101298074214633706907132624082305025
115444517870735015415413993718908291383297

[5,17,4097,1048577,1073741825,4398046511105,
 72057594037927937,4722366482869645213697,
 1237940039285380274899124225,
 1298074214633706907132624082305025,
 5444517870735015415413993718908291383297]