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A282820 as a simple table

n a(n)
0 0
1 0
2 0
3 9
4 132
5 720
6 2580
7 7245
8 17304
9 36792
10 71640
11 130185
12 223740
13 367224
14 579852
15 885885
16 1315440
17 1905360
18 2700144
19 3752937
20 5126580
21 6894720
22 9142980
23 11970189
24 15489672
25 19830600
26 25139400
27 31581225
28 39341484
29 48627432
30 59669820
31 72724605
32 88074720

[0,0,0,9,132,720,2580,7245,17304,36792,71640,
 130185,223740,367224,579852,885885,1315440,
 1905360,2700144,3752937,5126580,6894720,9142980,
 11970189,15489672,19830600,25139400,31581225,
 39341484,48627432,59669820,72724605,88074720]

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Last modified June 19 23:56 EDT 2019. Contains 324222 sequences. (Running on oeis4.)