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A025174 as a simple table

n a(n)
0 0
1 1
2 5
3 28
4 165
5 1001
6 6188
7 38760
8 245157
9 1562275
10 10015005
11 64512240
12 417225900
13 2707475148
14 17620076360
15 114955808528
16 751616304549
17 4923689695575
18 32308782859535
19 212327989773900
20 1397281501935165
21 9206478467454345
22 60727722660586800
23 400978991944396320

[0,1,5,28,165,1001,6188,38760,245157,1562275,
 10015005,64512240,417225900,2707475148,
 17620076360,114955808528,751616304549,
 4923689695575,32308782859535,212327989773900,
 1397281501935165,9206478467454345,
 60727722660586800,400978991944396320]

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Last modified May 18 15:59 EDT 2024. Contains 372664 sequences. (Running on oeis4.)