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A144894 as a simple table

n a(n)
0 1
1 5
2 55
3 485
4 4380
5 39570
6 421800
7 4265100
8 49455000
9 594001800
10 7784683200
11 107814672000
12 1624964544000
13 25881953328000
14 443107288512000
15 8028628336512000
16 154539996629760000
17 3135393617489280000
18 67045955961922560000
19 1503619681171829760000
20 35321502985569884160000

[1,5,55,485,4380,39570,421800,4265100,49455000,
 594001800,7784683200,107814672000,1624964544000,
 25881953328000,443107288512000,8028628336512000,
 154539996629760000,3135393617489280000,
 67045955961922560000,1503619681171829760000,
 35321502985569884160000]

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Last modified May 21 11:19 EDT 2019. Contains 323443 sequences. (Running on oeis4.)