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A165386 as a simple table

n a(n)
2 3
3 40
4 305
5 1622
6 6868
7 25036
8 82224
9 250208
10 718536
11 1972132
12 5220384
13 13417184
14 33652952
15 82699012
16 199729888
17 475260768
18 1116459752
19 2593550148
20 5965976992
21 13605076608
22 30787314104
23 69191005796
24 154539160288
25 343241755840

[3,40,305,1622,6868,25036,82224,250208,718536,
 1972132,5220384,13417184,33652952,82699012,
 199729888,475260768,1116459752,2593550148,
 5965976992,13605076608,30787314104,69191005796,
 154539160288,343241755840]

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Last modified March 29 08:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)