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A003519 as a simple table

n a(n)
4 1
5 10
6 65
7 350
8 1700
9 7752
10 33915
11 144210
12 600875
13 2466750
14 10015005
15 40320150
16 161280600
17 641886000
18 2544619500
19 10056336264
20 39645171810
21 155989499540
22 612815891050
23 2404551645100
24 9425842448792
25 36921502679600
26 144539291740025
27 565588532895750
28 2212449261033375

[1,10,65,350,1700,7752,33915,144210,600875,
 2466750,10015005,40320150,161280600,641886000,
 2544619500,10056336264,39645171810,155989499540,
 612815891050,2404551645100,9425842448792,
 36921502679600,144539291740025,565588532895750,
 2212449261033375]

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Last modified October 16 21:54 EDT 2018. Contains 316275 sequences. (Running on oeis4.)