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A062189 as a simple table

n a(n)
0 0
1 2
2 20
3 126
4 648
5 2970
6 12636
7 51030
8 198288
9 747954
10 2755620
11 9959598
12 35429400
13 124357194
14 431530092
15 1482720390
16 5050815264
17 17075199330
18 57338232372
19 191385721566
20 635369601960
21 2099044209402
22 6903833113980

[0,2,20,126,648,2970,12636,51030,198288,747954,
 2755620,9959598,35429400,124357194,431530092,
 1482720390,5050815264,17075199330,57338232372,
 191385721566,635369601960,2099044209402,
 6903833113980]

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Last modified May 13 01:02 EDT 2024. Contains 372497 sequences. (Running on oeis4.)