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A268408 as a simple table

n a(n)
1 0
2 1
3 0
4 4
5 12
6 56
7 2
8 1360
9 2672
10 320
11 16
12 350000
13 431232
14 107904
15 12864
16 3872
17 320
18 255036992
19 234667968
20 98251776
21 19523136
22 10633728
23 1615552
24 1182720
25 163520
26 127360
27 13440

[0,1,0,4,12,56,2,1360,2672,320,16,350000,431232,
 107904,12864,3872,320,255036992,234667968,
 98251776,19523136,10633728,1615552,1182720,163520,
 127360,13440]

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Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)