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A049505 as a simple table

n a(n)
0 1
1 2
2 10
3 112
4 2772
5 151008
6 18076916
7 4751252480
8 2740612658576
9 3468301123758080
10 9627912669442441500
11 58618653300361405440000
12 782683432110638830001250000
13 22916694891747599820616089600000
14 1471328419282772010324439370939640000

[1,2,10,112,2772,151008,18076916,4751252480,
 2740612658576,3468301123758080,
 9627912669442441500,58618653300361405440000,
 782683432110638830001250000,
 22916694891747599820616089600000,
 1471328419282772010324439370939640000]

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Last modified May 24 18:52 EDT 2013. Contains 225630 sequences.