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A009186 as a simple table

n a(n)
0 1
1 -1
2 2
3 -6
4 16
5 -72
6 328
7 -1848
8 11712
9 -81088
10 638720
11 -5318016
12 49459840
13 -483162240
14 5159926528
15 -57865303296
16 697030680576
17 -8815813734400
18 118233272496128
19 -1662921003208704
20 24578235697610752
21 -380141599264751616
22 6139851821419921408

[1,-1,2,-6,16,-72,328,-1848,11712,-81088,638720,
 -5318016,49459840,-483162240,5159926528,
 -57865303296,697030680576,-8815813734400,
 118233272496128,-1662921003208704,
 24578235697610752,-380141599264751616,
 6139851821419921408]

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Last modified June 23 04:14 EDT 2024. Contains 373629 sequences. (Running on oeis4.)