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A051575 as a simple table

n a(n)
0 1
1 1
2 2
3 10
4 70
5 210
6 4620
7 60060
8 60060
9 1021020
10 19399380
11 19399380
12 446185740
13 2230928700
14 13385572200
15 388181593800
16 12033629407800
17 12033629407800
18 12033629407800
19 445244288088600
20 445244288088600
21 18255015811632600

[1,1,2,10,70,210,4620,60060,60060,1021020,
 19399380,19399380,446185740,2230928700,
 13385572200,388181593800,12033629407800,
 12033629407800,12033629407800,445244288088600,
 445244288088600,18255015811632600]

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)