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A067994 as a simple table

n a(n)
0 1
1 0
2 -2
3 0
4 12
5 0
6 -120
7 0
8 1680
9 0
10 -30240
11 0
12 665280
13 0
14 -17297280
15 0
16 518918400
17 0
18 -17643225600
19 0
20 670442572800
21 0
22 -28158588057600
23 0
24 1295295050649600
25 0
26 -64764752532480000
27 0
28 3497296636753920000
29 0
30 -202843204931727360000
31 0

[1,0,-2,0,12,0,-120,0,1680,0,-30240,0,665280,0,
 -17297280,0,518918400,0,-17643225600,0,
 670442572800,0,-28158588057600,0,1295295050649600,
 0,-64764752532480000,0,3497296636753920000,0,
 -202843204931727360000,0]

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)