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A285751 as a simple table

n a(n)
1 0
2 4
3 8
4 44
5 150
6 540
7 2042
8 7760
9 29654
10 114336
11 442152
12 1713832
13 6655764
14 25893236
15 100873154
16 393455752
17 1536357188
18 6005069488
19 23492496948
20 91979426392
21 360391230046
22 1413045432264
23 5543910852492
24 21763924972776
25 85487754197390

[0,4,8,44,150,540,2042,7760,29654,114336,442152,
 1713832,6655764,25893236,100873154,393455752,
 1536357188,6005069488,23492496948,91979426392,
 360391230046,1413045432264,5543910852492,
 21763924972776,85487754197390]

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Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)