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A091040 as a simple table

n a(n)
1 1
2 4
3 16
4 98
5 1252
6 39056
7 3235216
8 746947664
9 504955938112
10 1063702416056576
11 7035749505695570176
12 160587398553186610959104
13 12278492143557175831484111872
14 3469220019297527430713345352498176

[1,4,16,98,1252,39056,3235216,746947664,
 504955938112,1063702416056576,7035749505695570176,
 160587398553186610959104,
 12278492143557175831484111872,
 3469220019297527430713345352498176]

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Last modified July 2 04:14 EDT 2022. Contains 354985 sequences. (Running on oeis4.)