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A051958 as a simple table

n a(n)
0 0
1 1
2 2
3 28
4 104
5 880
6 4256
7 29632
8 161408
9 1033984
10 5941760
11 36699136
12 216000512
13 1312780288
14 7809572864
15 47125872640
16 281681494016
17 1694383931392
18 10149123719168
19 60963461791744
20 365505892843520
21 2194134868688896

[0,1,2,28,104,880,4256,29632,161408,1033984,
 5941760,36699136,216000512,1312780288,7809572864,
 47125872640,281681494016,1694383931392,
 10149123719168,60963461791744,365505892843520,
 2194134868688896]

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)