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A002664 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 7
7 29
8 93
9 256
10 638
11 1486
12 3302
13 7099
14 14913
15 30827
16 63019
17 127858
18 258096
19 519252
20 1042380
21 2089605
22 4185195
23 8377705
24 16764265
25 33539156
26 67090962
27 134196874
28 268411298
29 536843071
30 1073709893

[0,0,0,0,0,1,7,29,93,256,638,1486,3302,7099,14913,
 30827,63019,127858,258096,519252,1042380,2089605,
 4185195,8377705,16764265,33539156,67090962,
 134196874,268411298,536843071,1073709893]

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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)