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A104176 as a simple table

n a(n)
0 1
1 1
2 3
3 3
4 7
5 15
6 31
7 55
8 127
9 127
10 255
11 511
12 1023
13 2047
14 4095
15 8191
16 16383
17 32767
18 65535
19 126975
20 262143
21 524287
22 1048575
23 2097151
24 4194303
25 8388607
26 16777215
27 33554431
28 67108863
29 134217727
30 268435455
31 536870911
32 1073741823
33 2147483647

[1,1,3,3,7,15,31,55,127,127,255,511,1023,2047,
 4095,8191,16383,32767,65535,126975,262143,524287,
 1048575,2097151,4194303,8388607,16777215,33554431,
 67108863,134217727,268435455,536870911,1073741823,
 2147483647]

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Last modified July 17 23:42 EDT 2024. Contains 374377 sequences. (Running on oeis4.)