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A287188 as a simple table

n a(n)
0 1
1 3
2 3
3 15
4 3
5 63
6 15
7 255
8 15
9 1023
10 15
11 4095
12 15
13 16383
14 255
15 65535
16 255
17 262143
18 255
19 1048575
20 255
21 4194303
22 255
23 16777215
24 255
25 67108863
26 255
27 268435455
28 255
29 1073741823
30 65535
31 4294967295
32 65535
33 17179869183
34 65535
35 68719476735
36 65535
37 274877906943

[1,3,3,15,3,63,15,255,15,1023,15,4095,15,16383,
 255,65535,255,262143,255,1048575,255,4194303,255,
 16777215,255,67108863,255,268435455,255,
 1073741823,65535,4294967295,65535,17179869183,
 65535,68719476735,65535,274877906943]

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Last modified July 17 08:42 EDT 2019. Contains 325098 sequences. (Running on oeis4.)