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A326513
as a simple table
n
a(n)
0
1
1
1
2
2
3
4
4
12
5
40
6
154
7
650
8
3024
9
15110
10
81538
11
468494
12
2863340
[1,1,2,4,12,40,154,650,3024,15110,81538,468494, 2863340]
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Last modified April 17 17:01 EDT 2024. Contains 371765 sequences. (Running on oeis4.)