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A009367 as a simple table

n a(n)
0 0
1 1
2 -1
3 2
4 -6
5 16
6 -72
7 496
8 -3248
9 24064
10 -208384
11 1908224
12 -19624704
13 227958784
14 -2800573440
15 36620830720
16 -519452284928
17 7865201852416
18 -126035093291008
19 2142236553248768
20 -38449509963399168
21 725477781101608960

[0,1,-1,2,-6,16,-72,496,-3248,24064,-208384,
 1908224,-19624704,227958784,-2800573440,
 36620830720,-519452284928,7865201852416,
 -126035093291008,2142236553248768,
 -38449509963399168,725477781101608960]

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)