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A005489 as a simple table

n a(n)
1 1
2 1
3 2
4 1
5 8
6 7
7 32
8 31
9 96
10 97
11 512
12 511
13 2048
14 2047
15 7396
16 7531
17 32768
18 32767
19 131072
20 131071
21 508436
22 512245
23 2097152
24 2097151
25 8202208
26 8207797
27 33256980
28 33335611
29 134217728
30 134217727
31 536870912
32 536870911
33 2142108916
34 2143603741
35 8589928768
36 8589921949

[1,1,2,1,8,7,32,31,96,97,512,511,2048,2047,7396,
 7531,32768,32767,131072,131071,508436,512245,
 2097152,2097151,8202208,8207797,33256980,33335611,
 134217728,134217727,536870912,536870911,
 2142108916,2143603741,8589928768,8589921949]

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Last modified June 14 02:33 EDT 2021. Contains 345016 sequences. (Running on oeis4.)