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A087814 as a simple table

n a(n)
0 1
1 1
2 13
3 15
4 25
5 39
6 47
7 51
8 69
9 81
10 101
11 139
12 249
13 261
14 275
15 291
16 739
17 1243
18 2243

[1,1,13,15,25,39,47,51,69,81,101,139,249,261,275,
 291,739,1243,2243]

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Last modified April 19 17:49 EDT 2024. Contains 371797 sequences. (Running on oeis4.)