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A056349 as a simple table

n a(n)
1 0
2 0
3 1
4 6
5 18
6 55
7 147
8 405
9 1083
10 2961
11 8043
12 22182
13 61278
14 170883
15 477910
16 1344825
17 3795750
18 10757763
19 30572427
20 87146139
21 248991674
22 713088309
23 2046303339
24 5883410760
25 16944543792
26 48879708297

[0,0,1,6,18,55,147,405,1083,2961,8043,22182,61278,
 170883,477910,1344825,3795750,10757763,30572427,
 87146139,248991674,713088309,2046303339,
 5883410760,16944543792,48879708297]

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Last modified July 24 05:18 EDT 2024. Contains 374575 sequences. (Running on oeis4.)