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A367489 as a simple table

n a(n)
0 0
1 0
2 4
3 18
4 120
5 1110
6 13140
7 189042
8 3197040
9 62093358
10 1361253900
11 33236925546
12 894243758760
13 26281928034726
14 837663638344260
15 28775491618091490
16 1059805146165293280
17 41657455054069680414
18 1740535210734651716220
19 77029901631623181859674

[0,0,4,18,120,1110,13140,189042,3197040,62093358,
 1361253900,33236925546,894243758760,
 26281928034726,837663638344260,28775491618091490,
 1059805146165293280,41657455054069680414,
 1740535210734651716220,77029901631623181859674]

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Last modified May 28 04:02 EDT 2024. Contains 372900 sequences. (Running on oeis4.)