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A003697 as a simple table

n a(n)
0 1
1 2
2 9
3 32
4 121
5 450
6 1681
7 6272
8 23409
9 87362
10 326041
11 1216800
12 4541161
13 16947842

[1,2,9,32,121,450,1681,6272,23409,87362,326041,
 1216800,4541161,16947842]

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Last modified August 7 23:38 EDT 2020. Contains 336279 sequences. (Running on oeis4.)