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A046979 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 3
4 1
5 30
6 90
7 630
8 1
9 22680
10 113400
11 1247400
12 1
13 97297200
14 681080400
15 10216206000
16 1
17 1389404016000
18 12504636144000
19 237588086736000
20 1
21 49893498214560000
22 548828480360160000
23 12623055048283680000
24 1
25 3786916514485104000000

[1,1,1,3,1,30,90,630,1,22680,113400,1247400,1,
 97297200,681080400,10216206000,1,1389404016000,
 12504636144000,237588086736000,1,
 49893498214560000,548828480360160000,
 12623055048283680000,1,3786916514485104000000]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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