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A003209
as a simple table
n
a(n)
0
1
1
12
2
84
3
504
4
3012
5
17142
6
96228
7
532028
8
2918388
9
15763956
[1,12,84,504,3012,17142,96228,532028,2918388, 15763956]
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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)