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A144487 as a simple table

n a(n)
1 17
2 19
3 23
4 31
5 47
6 79
7 271
8 1039
9 2063
10 4111
11 32783
12 65551
13 4194319
14 8388623
15 67108879
16 1073741839
17 4294967311
18 1099511627791
19 4398046511119
20 70368744177679
21 2305843009213693967
22 4722366482869645213711
23 75557863725914323419151

[17,19,23,31,47,79,271,1039,2063,4111,32783,65551,
 4194319,8388623,67108879,1073741839,4294967311,
 1099511627791,4398046511119,70368744177679,
 2305843009213693967,4722366482869645213711,
 75557863725914323419151]

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Last modified June 13 22:55 EDT 2021. Contains 345016 sequences. (Running on oeis4.)