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A084154 as a simple table

n a(n)
0 0
1 1
2 2
3 10
4 32
5 116
6 392
7 1352
8 4608
9 15760
10 53792
11 183712
12 627200
13 2141504
14 7311488
15 24963200
16 85229568
17 290992384
18 993509888
19 3392055808
20 11581202432
21 39540700160
22 135000393728
23 460920178688
24 1573679923200
25 5372879343616

[0,1,2,10,32,116,392,1352,4608,15760,53792,183712,
 627200,2141504,7311488,24963200,85229568,
 290992384,993509888,3392055808,11581202432,
 39540700160,135000393728,460920178688,
 1573679923200,5372879343616]

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Last modified May 3 12:43 EDT 2024. Contains 372212 sequences. (Running on oeis4.)