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A013280 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 3
5 -30
6 180
7 -945
8 7665
9 -94500
10 1124550
11 -12525975
12 156808575
13 -2347294950
14 37345908600
15 -602685208125
16 10429905110625
17 -198454585329000
18 3981241066052250
19 -82461126798925875

[1,0,0,0,3,-30,180,-945,7665,-94500,1124550,
 -12525975,156808575,-2347294950,37345908600,
 -602685208125,10429905110625,-198454585329000,
 3981241066052250,-82461126798925875]

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Last modified June 15 06:51 EDT 2024. Contains 373402 sequences. (Running on oeis4.)