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A277423 as a simple table

n a(n)
0 1
1 0
2 -2
3 6
4 24
5 -380
6 720
7 31794
8 -361088
9 -2104056
10 101548800
11 -612792290
12 -25534891008
13 593660731404
14 2831189530624
15 -361541172525750
16 4481749181890560
17 169464194149739536
18 -6805365045197340672
19 -9663483091971306186
20 6883830206467440640000

[1,0,-2,6,24,-380,720,31794,-361088,-2104056,
 101548800,-612792290,-25534891008,593660731404,
 2831189530624,-361541172525750,4481749181890560,
 169464194149739536,-6805365045197340672,
 -9663483091971306186,6883830206467440640000]

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Last modified April 19 11:14 EDT 2024. Contains 371791 sequences. (Running on oeis4.)