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A123899 as a simple table

n a(n)
0 1
1 2
2 3
3 12
4 60
5 360
6 252
7 2016
8 36288
9 362880
10 4989600
11 11975040
12 622702080
13 8717829120
14 65383718400
15 5230697472000
16 2736057139200
17 49249028505600
18 30411275102208
19 608225502044160
20 25545471085854720000

[1,2,3,12,60,360,252,2016,36288,362880,4989600,
 11975040,622702080,8717829120,65383718400,
 5230697472000,2736057139200,49249028505600,
 30411275102208,608225502044160,
 25545471085854720000]

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Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)