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A137537
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
23
5
104
6
532
7
3003
8
18400
9
120960
10
845823
11
6249642
12
48539947
13
394620211
14
3346466726
15
29516055880
[1,1,2,6,23,104,532,3003,18400,120960,845823, 6249642,48539947,394620211,3346466726,29516055880]
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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)
