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A074922 as a simple table

n a(n)
0 0
1 0
2 0
3 3
4 28
5 180
6 990
7 5005
8 24024
9 111384
10 503880
11 2238390
12 9806280
13 42493880
14 182530530
15 778439025
16 3300049200
17 13919756400
18 58462976880
19 244639718730
20 1020422356200
21 4244365452600
22 17610393500700
23 72907029092898

[0,0,0,3,28,180,990,5005,24024,111384,503880,
 2238390,9806280,42493880,182530530,778439025,
 3300049200,13919756400,58462976880,244639718730,
 1020422356200,4244365452600,17610393500700,
 72907029092898]

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Last modified March 28 03:28 EDT 2024. Contains 371235 sequences. (Running on oeis4.)