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A002589 as a simple table

n a(n)
0 3
1 1
2 11
3 43
4 19
5 683
6 2731
7 331
8 43691
9 174763
10 5419
11 2796203
12 4051
13 87211
14 3033169
15 715827883
16 20857
17 86171
18 25781083
19 22366891
20 8831418697
21 2932031007403
22 18837001
23 165768537521
24 4363953127297
25 6529
26 28059810762433
27 48912491
28 160465489

[3,1,11,43,19,683,2731,331,43691,174763,5419,
 2796203,4051,87211,3033169,715827883,20857,86171,
 25781083,22366891,8831418697,2932031007403,
 18837001,165768537521,4363953127297,6529,
 28059810762433,48912491,160465489]

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Last modified June 3 05:29 EDT 2020. Contains 334798 sequences. (Running on oeis4.)