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A225883 as a simple table

n a(n)
0 0
1 1
2 -3
3 7
4 -15
5 31
6 -63
7 127
8 -255
9 511
10 -1023
11 2047
12 -4095
13 8191
14 -16383
15 32767
16 -65535
17 131071
18 -262143
19 524287
20 -1048575
21 2097151
22 -4194303
23 8388607
24 -16777215
25 33554431
26 -67108863
27 134217727
28 -268435455
29 536870911
30 -1073741823
31 2147483647
32 -4294967295

[0,1,-3,7,-15,31,-63,127,-255,511,-1023,2047,
 -4095,8191,-16383,32767,-65535,131071,-262143,
 524287,-1048575,2097151,-4194303,8388607,
 -16777215,33554431,-67108863,134217727,-268435455,
 536870911,-1073741823,2147483647,-4294967295]

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)