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A118067 as a simple table

n a(n)
1 0
2 0
3 0
4 16
5 0
6 0
7 104
8 792
9 1120
10 6096
11 21344
12 114496
13 257728
14 1292544
15 3677568
16 17273760
17 46801984
18 211731376
19 611507360
20 2645699504
21 7725948608
22 32451640000
23 97488160384
24 397346625760
25 1214082434112
26 4835168968464
27 15039729265856
28 58641619298000

[0,0,0,16,0,0,104,792,1120,6096,21344,114496,
 257728,1292544,3677568,17273760,46801984,
 211731376,611507360,2645699504,7725948608,
 32451640000,97488160384,397346625760,
 1214082434112,4835168968464,15039729265856,
 58641619298000]

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Last modified August 23 13:08 EDT 2017. Contains 291004 sequences.