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A063515 as a simple table

n a(n)
1 1
2 8
3 24
4 104
5 216
6 384
7 1080
8 2160
9 4896
10 13656
11 32552
12 51312
13 137160
14 287408
15 573600
16 1999872
17 3034368
18 4778400
19 11098080
20 20984560
21 49533120
22 137218560
23 294000768
24 417361152
25 958698064
26 1755253280
27 4362821232
28 10552800000

[1,8,24,104,216,384,1080,2160,4896,13656,32552,
 51312,137160,287408,573600,1999872,3034368,
 4778400,11098080,20984560,49533120,137218560,
 294000768,417361152,958698064,1755253280,
 4362821232,10552800000]

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Last modified January 28 13:14 EST 2020. Contains 331321 sequences. (Running on oeis4.)