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A056500 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 12
7 24
8 132
9 240
10 900
11 1560
12 4968
13 8400
14 24588
15 40824
16 113520
17 186480
18 502248
19 818520
20 2157360
21 3497976
22 9085452
23 14676024
24 37723260
25 60780720
26 155082900
27 249401640
28 632947728
29 1016542800
30 2569816476
31 4123173624
32 10393520640

[0,0,0,0,0,12,24,132,240,900,1560,4968,8400,24588,
 40824,113520,186480,502248,818520,2157360,3497976,
 9085452,14676024,37723260,60780720,155082900,
 249401640,632947728,1016542800,2569816476,
 4123173624,10393520640]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)