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A294036 as a simple table

n a(n)
0 1
1 4
2 16
3 64
4 280
5 1504
6 9856
7 70144
8 498136
9 3449440
10 23506816
11 160566784
12 1115048896
13 7905796864
14 56994288640
15 414928113664
16 3034880623576
17 22255957312864
18 163667338903936
19 1208070406612480
20 8955840250934080
21 66678657938510080

[1,4,16,64,280,1504,9856,70144,498136,3449440,
 23506816,160566784,1115048896,7905796864,
 56994288640,414928113664,3034880623576,
 22255957312864,163667338903936,1208070406612480,
 8955840250934080,66678657938510080]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)