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A075896 as a simple table

na(n)
17
279
3431
4130783
5523927
62251799813682647
79007199254738183
82417851639229258349405791
99671406556917033397642519
10664613997892457936451903530140158127
11784637716923335095479473677900958302012794430558004278391

[7,79,431,130783,523927,2251799813682647,
 9007199254738183,2417851639229258349405791,
 9671406556917033397642519,
 664613997892457936451903530140158127,
 78463771692333509547947367790095830201279443055800\
 4278391]