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A004387 as a simple table

n a(n)
6 1
7 56
8 2016
9 59640
10 1581580
11 39175752
12 927048304
13 21243342120
14 475491062970
15 10456592670160
16 226846154180800
17 4868956823342976
18 103619293824707388
19 2190038132512694800
20 46026828991565696400 

[1,56,2016,59640,1581580,39175752,927048304,
 21243342120,475491062970,10456592670160,
 226846154180800,4868956823342976,
 103619293824707388,2190038132512694800,
 46026828991565696400]

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Last modified August 19 10:05 EDT 2024. Contains 375284 sequences. (Running on oeis4.)