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A147235
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
3
9
7
10
15
11
31
12
65
13
185
14
517
15
1673
16
6585
17
26113
18
126591
19
608081
20
3381041
21
20245821
22
136182387
[1,1,1,1,1,1,1,3,7,15,31,65,185,517,1673,6585, 26113,126591,608081,3381041,20245821,136182387]
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Last modified August 26 13:58 EDT 2024. Contains 375456 sequences. (Running on oeis4.)