A166157 - OEIS

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A166157 as a simple table

n	a(n)
0	1
1	-8
2	80
3	-656
4	6416
5	-53648
6	515600
7	-4378256
8	41501456
9	-356735888
10	3344840720
11	-29029824656
12	269858356496
13	-2360005731728
14	21789807399440
15	-191710220083856
16	1760576352843536
17	-15563712198881168

[1,-8,80,-656,6416,-53648,515600,-4378256, 41501456,-356735888,3344840720,-29029824656, 269858356496,-2360005731728,21789807399440, -191710220083856,1760576352843536, -15563712198881168]