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A010931
as a simple table
n
a(n)
0
1
1
15
2
105
3
455
4
1365
5
3003
6
5005
7
6435
8
6435
9
5005
10
3003
11
1365
12
455
13
105
14
15
15
1
[1,15,105,455,1365,3003,5005,6435,6435,5005,3003, 1365,455,105,15,1]
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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)