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A203467 as a simple table

n a(n)
0 1
1 1
2 2
3 15
4 630
5 198450
6 589396500
7 19912024006875
8 8969371213896843750
9 61815874928487448987968750
10 7358663747680777931818630148437500
11 16862758880642741957030086746987589746093750

[1,1,2,15,630,198450,589396500,19912024006875,
 8969371213896843750,61815874928487448987968750,
 7358663747680777931818630148437500,
 16862758880642741957030086746987589746093750]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)