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A027806 as a simple table

n a(n)
6 210
7 2640
8 17820
9 85800
10 330330
11 1081080
12 3123120
13 8168160
14 19691100
15 44341440
16 94225560
17 190466640
18 368588220
19 686439600
20 1235591280
21 2157381600
22 3665097150
23 6074125200
24 9842332500
25 15623407800
26 24336462150
27 37255818600
28 56125648800
29 83304936000
30 121949170200

[210,2640,17820,85800,330330,1081080,3123120,
 8168160,19691100,44341440,94225560,190466640,
 368588220,686439600,1235591280,2157381600,
 3665097150,6074125200,9842332500,15623407800,
 24336462150,37255818600,56125648800,83304936000,
 121949170200]

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Last modified July 19 22:14 EDT 2019. Contains 325168 sequences. (Running on oeis4.)