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A009328 as a simple table

n a(n)
0 0
1 1
2 -1
3 2
4 -6
5 16
6 -72
7 328
8 -1904
9 12160
10 -89344
11 721280
12 -6445824
13 62638720
14 -660602880
15 7495723264
16 -91175548928
17 1182630301696
18 -16301080281088
19 237887012458496
20 -3664597991424000
21 59422015832915968

[0,1,-1,2,-6,16,-72,328,-1904,12160,-89344,721280,
 -6445824,62638720,-660602880,7495723264,
 -91175548928,1182630301696,-16301080281088,
 237887012458496,-3664597991424000,
 59422015832915968]

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Last modified June 13 03:56 EDT 2024. Contains 373366 sequences. (Running on oeis4.)