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A251748 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 0
7 0
8 0
9 1
10 2
11 4
12 8
13 16
14 32
15 63
16 126
17 252
18 504
19 1007
20 2012
21 4020
22 8032
23 16048
24 32064
25 64065
26 128004
27 255756
28 511008
29 1021009
30 2040006
31 4075992
32 8143952
33 16271856
34 32511648
35 64959231
36 129790458
37 259325160
38 518139312
39 1035257615
40 2068475224

[0,0,0,0,0,1,0,0,0,1,2,4,8,16,32,63,126,252,504,
 1007,2012,4020,8032,16048,32064,64065,128004,
 255756,511008,1021009,2040006,4075992,8143952,
 16271856,32511648,64959231,129790458,259325160,
 518139312,1035257615,2068475224]

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Last modified July 10 01:34 EDT 2024. Contains 374191 sequences. (Running on oeis4.)