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A306266 as a simple table

n a(n)
1 1
2 2
3 54
4 6480
5 2268000
6 1837080000
7 2970558360000
8 8650265944320000
9 42040292489395200000
10 321608237543873280000000
11 3696886690566823353600000000
12 61486619437507406017075200000000
13 1433990938521547723130227814400000000 

[1,2,54,6480,2268000,1837080000,2970558360000,
 8650265944320000,42040292489395200000,
 321608237543873280000000,
 3696886690566823353600000000,
 61486619437507406017075200000000,
 1433990938521547723130227814400000000]

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Last modified September 26 09:06 EDT 2023. Contains 365654 sequences. (Running on oeis4.)