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A052572 as a simple table

n a(n)
0 1
1 4
2 10
3 36
4 168
5 960
6 6480
7 50400
8 443520
9 4354560
10 47174400
11 558835200
12 7185024000
13 99632332800
14 1482030950400
15 23538138624000
16 397533007872000
17 7113748561920000
18 134449847820288000
19 2676192208994304000

[1,4,10,36,168,960,6480,50400,443520,4354560,
 47174400,558835200,7185024000,99632332800,
 1482030950400,23538138624000,397533007872000,
 7113748561920000,134449847820288000,
 2676192208994304000]

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Last modified April 25 13:12 EDT 2024. Contains 371969 sequences. (Running on oeis4.)