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A128001
as a simple table
n
a(n)
1
2
2
3
3
7
4
27
5
51
6
55
7
81
8
1471
9
1483
10
8668
11
10885
12
20803
13
32605
14
36391
15
57004
16
61627
17
88651
18
89731
[2,3,7,27,51,55,81,1471,1483,8668,10885,20803, 32605,36391,57004,61627,88651,89731]