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A003504 formatted as a simple table:

n a(n)
0 1
1 1
2 2
3 3
4 5
5 10
6 28
7 154
8 3520
9 1551880
10 267593772160
11 7160642690122633501504
12 4661345794146064133843098964919305264116096
13 1810678717716933442325741630275004084414865420898591223522682022447438928019172629856

[1,1,2,3,5,10,28,154,3520,1551880,267593772160,
 7160642690122633501504,
 4661345794146064133843098964919305264116096,
 1810678717716933442325741630275004084414865420898591223522682022447438928019172629856]

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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