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A280425 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 120
6 600
7 3720
8 27240
9 229080
10 2170680
11 22852200
12 264398280
13 3332744760
14 45440868120
15 666166856520
16 10446911529000
17 174478419885720
18 3091496076405240
19 57915148833808680
20 1143668772912038280
21 23742102690747895800
22 516882856872298424280
23 11775038596933279562760

[0,0,0,0,120,600,3720,27240,229080,2170680,
 22852200,264398280,3332744760,45440868120,
 666166856520,10446911529000,174478419885720,
 3091496076405240,57915148833808680,
 1143668772912038280,23742102690747895800,
 516882856872298424280,11775038596933279562760]

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Last modified September 26 21:46 EDT 2020. Contains 337377 sequences. (Running on oeis4.)