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A303831 as a simple table

n a(n)
1 0
2 1
3 3
4 16
5 98
6 879
7 11260
8 230505
9 7949596
10 483572280
11 53011686200
12 10589943940654
13 3880959679322754
14 2623201177625659987
15 3286005731275218388682
16 7663042204550840483139108
17 33407704152242477510352455230
18 273327599183687887638526170380380

[0,1,3,16,98,879,11260,230505,7949596,483572280,
 53011686200,10589943940654,3880959679322754,
 2623201177625659987,3286005731275218388682,
 7663042204550840483139108,
 33407704152242477510352455230,
 273327599183687887638526170380380]

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Last modified April 24 11:47 EDT 2024. Contains 371936 sequences. (Running on oeis4.)