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A179320 as a simple table

n a(n)
0 0
1 2
2 -2
3 6
4 -28
5 160
6 -936
7 4536
8 -20448
9 627264
10 -19699200
11 43908480
12 17788273920
13 -211715112960
14 -41219197125120
15 1301670191808000
16 160057006683033600
17 -10037518414724505600
18 -1007362871616478003200

[0,2,-2,6,-28,160,-936,4536,-20448,627264,
 -19699200,43908480,17788273920,-211715112960,
 -41219197125120,1301670191808000,
 160057006683033600,-10037518414724505600,
 -1007362871616478003200]

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Last modified October 19 11:09 EDT 2019. Contains 328216 sequences. (Running on oeis4.)