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A265886 as a simple table

n a(n)
1 3
2 12
3 68
4 664
5 13672
6 560512
7 51483264
8 8726974464
9 3316077264896
10 2260633288966144
11 3463290521072435200
12 9453965541320232534016
13 58047351977461819763589120
14 633980080610711649347287646208

[3,12,68,664,13672,560512,51483264,8726974464,
 3316077264896,2260633288966144,
 3463290521072435200,9453965541320232534016,
 58047351977461819763589120,
 633980080610711649347287646208]

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Last modified July 4 19:41 EDT 2022. Contains 355084 sequences. (Running on oeis4.)