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A236409 as a simple table

n a(n)
2 3
3 10
4 45
5 270
6 1737
7 13280
8 121500
9 1231200
10 12994020
11 151817274
12 2041564500
13 29351808000
14 448218360000
15 7027147872000
16 118449530725500
17 2207253791691000
18 43402342378752000
19 889018706142000000
20 19030271359352400000

[3,10,45,270,1737,13280,121500,1231200,12994020,
 151817274,2041564500,29351808000,448218360000,
 7027147872000,118449530725500,2207253791691000,
 43402342378752000,889018706142000000,
 19030271359352400000]

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Last modified June 21 19:59 EDT 2021. Contains 345365 sequences. (Running on oeis4.)