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A251749 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 0
6 0
7 0
8 0
9 1
10 2
11 4
12 8
13 16
14 31
15 62
16 124
17 248
18 496
19 991
20 1980
21 3956
22 7904
23 15792
24 31553
25 63044
26 125964
27 251680
28 502864
29 1004737
30 2007494
31 4011032
32 8014160
33 16012528
34 31993503
35 63923962
36 127721960
37 255192240
38 509881616
39 1018758495
40 2035509496

[0,0,0,0,1,0,0,0,0,1,2,4,8,16,31,62,124,248,496,
 991,1980,3956,7904,15792,31553,63044,125964,
 251680,502864,1004737,2007494,4011032,8014160,
 16012528,31993503,63923962,127721960,255192240,
 509881616,1018758495,2035509496]

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Last modified June 2 21:38 EDT 2024. Contains 373051 sequences. (Running on oeis4.)