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A007724 as a simple table

n a(n)
2 2
3 12
4 110
5 1274
6 17136
7 255816
8 4124406
9 70549050
10 1264752060
11 23555382240
12 452806924752
13 8939481277552
14 180551099694400
15 3719061442253520
16 77933728043586630
17 1658001861319441050
18 35749633305661575300
19 780123576993991461000
20 17208112644166765652100 

[2,12,110,1274,17136,255816,4124406,70549050,
 1264752060,23555382240,452806924752,8939481277552,
 180551099694400,3719061442253520,
 77933728043586630,1658001861319441050,
 35749633305661575300,780123576993991461000,
 17208112644166765652100]

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Last modified May 18 23:43 EDT 2024. Contains 372666 sequences. (Running on oeis4.)