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A282798 as a simple table

n a(n)
0 1
1 0
2 7
3 4
4 31
5 20
6 127
7 84
8 511
9 340
10 2047
11 1364
12 8191
13 5460
14 32767
15 21844
16 131071
17 87380
18 524287
19 349524
20 2097151
21 1398100
22 8388607
23 5592404
24 33554431
25 22369620
26 134217727
27 89478484
28 536870911
29 357913940
30 2147483647
31 1431655764
32 8589934591
33 5726623060

[1,0,7,4,31,20,127,84,511,340,2047,1364,8191,5460,
 32767,21844,131071,87380,524287,349524,2097151,
 1398100,8388607,5592404,33554431,22369620,
 134217727,89478484,536870911,357913940,2147483647,
 1431655764,8589934591,5726623060]

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Last modified January 18 16:27 EST 2020. Contains 331011 sequences. (Running on oeis4.)