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A054950 as a simple table

n a(n)
1 0
2 1
3 3
4 76
5 8220
6 3418216
7 5156362008
8 28205998918336
9 571801003320734400
10 44006976469834509225856
11 13095012982298536065778624128
12 15245644966564725709168192019570176
13 69953982671396722666217758540260522923520
14 1270721533437616701720124856867026526491583190016

[0,1,3,76,8220,3418216,5156362008,28205998918336,
 571801003320734400,44006976469834509225856,
 13095012982298536065778624128,
 15245644966564725709168192019570176,
 69953982671396722666217758540260522923520,
 1270721533437616701720124856867026526491583190016]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)