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A002456 as a simple table

n a(n)
1 0
2 1
3 30
4 1260
5 75600
6 6237000
7 681080400
8 95351256000
9 16672848192000
10 3563821301040000
11 914714133933600000
12 277707211062240960000
13 98459829376612704000000
14 40319300129722902288000000
15 18888041368462498071840000000
16 10037644841525784689606400000000 

[0,1,30,1260,75600,6237000,681080400,95351256000,
 16672848192000,3563821301040000,
 914714133933600000,277707211062240960000,
 98459829376612704000000,
 40319300129722902288000000,
 18888041368462498071840000000,
 10037644841525784689606400000000]

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)