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A042979 as a simple table

n a(n)
1 0
2 0
3 1
4 0
5 2
6 2
7 4
8 8
9 13
10 24
11 48
12 80
13 160
14 288
15 541
16 1024
17 1920
18 3626
19 6912
20 13056
21 24989
22 47616
23 91136
24 174760
25 335462
26 645120
27 1242904
28 2396160
29 4628480
30 8947294
31 17317888
32 33554432
33 65074253
34 126320640
35 245428574
36 477211280
37 928645120
38 1808400384
39 3524068955
40 6871947672
41 13408665600
42 26178823218

[0,0,1,0,2,2,4,8,13,24,48,80,160,288,541,1024,
 1920,3626,6912,13056,24989,47616,91136,174760,
 335462,645120,1242904,2396160,4628480,8947294,
 17317888,33554432,65074253,126320640,245428574,
 477211280,928645120,1808400384,3524068955,
 6871947672,13408665600,26178823218]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)