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A054373 as a simple table

n a(n)
1 0
2 -8
3 0
4 0
5 -2048
6 0
7 192
8 16384
9 28311552
10 0
11 0
12 -1179648
13 0
14 29686813949952
15 0
16 -7680
17 67108864
18 -289910292480
19 5699868278390784
20 -3039929748475084800000
21 0
22 0
23 -838860800
24 0
25 1094374709451030528
26 0
27 -37180135792929290696471347200000

[0,-8,0,0,-2048,0,192,16384,28311552,0,0,-1179648,
 0,29686813949952,0,-7680,67108864,-289910292480,
 5699868278390784,-3039929748475084800000,0,0,
 -838860800,0,1094374709451030528,0,
 -37180135792929290696471347200000]

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Last modified February 20 11:01 EST 2020. Contains 332073 sequences. (Running on oeis4.)