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A103620 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 9
5 45
6 225
7 1575
8 11130
9 100170
10 897750
11 9875250
12 108523800
13 1410809400
14 18332414100
15 274986211500
16 4127136413400
17 70161319027800
18 1192076391706200
19 22649451442417800
20 430247983427262000
21 9035207651972502000

[1,1,1,3,9,45,225,1575,11130,100170,897750,
 9875250,108523800,1410809400,18332414100,
 274986211500,4127136413400,70161319027800,
 1192076391706200,22649451442417800,
 430247983427262000,9035207651972502000]

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Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)