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A331579
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
16
6
18
7
64
8
34
9
36
10
66
11
1024
12
68
13
4096
14
258
15
132
16
136
17
65536
18
146
19
262144
20
264
21
516
22
4098
[1,2,4,8,16,18,64,34,36,66,1024,68,4096,258,132, 136,65536,146,262144,264,516,4098]