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A058396 as a simple table

n a(n)
0 1
1 3
2 9
3 25
4 66
5 168
6 416
7 1008
8 2400
9 5632
10 13056
11 29952
12 68096
13 153600
14 344064
15 765952
16 1695744
17 3735552
18 8192000
19 17891328
20 38928384
21 84410368
22 182452224
23 393216000
24 845152256
25 1811939328
26 3875536896
27 8271167488
28 17616076800

[1,3,9,25,66,168,416,1008,2400,5632,13056,29952,
 68096,153600,344064,765952,1695744,3735552,
 8192000,17891328,38928384,84410368,182452224,
 393216000,845152256,1811939328,3875536896,
 8271167488,17616076800]

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Last modified April 24 19:06 EDT 2024. Contains 371962 sequences. (Running on oeis4.)