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A012593 as a simple table

n a(n)
0 1
1 0
2 1
3 6
4 21
5 60
6 285
7 2170
8 12873
9 54936
10 391065
11 4881998
12 33969309
13 28359188
14 826179445
15 48496348290
16 328705747217
17 -5928717037136
18 -26909518872399
19 2320514677184022
20 14213386673919397

[1,0,1,6,21,60,285,2170,12873,54936,391065,
 4881998,33969309,28359188,826179445,48496348290,
 328705747217,-5928717037136,-26909518872399,
 2320514677184022,14213386673919397]

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Last modified September 22 20:09 EDT 2020. Contains 337291 sequences. (Running on oeis4.)