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A215586 as a simple table

n a(n)
0 1
1 0
2 0
3 -3
4 0
5 -30
6 90
7 -588
8 5040
9 -26520
10 325080
11 -2158728
12 27731880
13 -249259920
14 3181258080
15 -36821629848
16 482278043520
17 -6704476956480
18 93675256079040
19 -1479108131816448
20 22566722722104960
21 -390679249452835200
22 6559255213047250560
23 -122197022127873558528

[1,0,0,-3,0,-30,90,-588,5040,-26520,325080,
 -2158728,27731880,-249259920,3181258080,
 -36821629848,482278043520,-6704476956480,
 93675256079040,-1479108131816448,
 22566722722104960,-390679249452835200,
 6559255213047250560,-122197022127873558528]

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Last modified September 25 14:37 EDT 2022. Contains 356984 sequences. (Running on oeis4.)