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A204322 as a simple table

n a(n)
1 0
2 2
3 6
4 18
5 50
6 290
7 2582
8 20462
9 23870
10 26342
11 31938
12 38122
13 65034
14 70130
15 245538
16 851878
17 1052422
18 1496566
19 5380542
20 8431178 

[0,2,6,18,50,290,2582,20462,23870,26342,31938,
 38122,65034,70130,245538,851878,1052422,1496566,
 5380542,8431178]

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Last modified April 19 03:57 EDT 2024. Contains 371782 sequences. (Running on oeis4.)