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A224661
as a simple table
n
a(n)
1
5
2
20
3
98
4
180
5
412
6
806
7
1606
8
3070
9
5808
10
10798
11
19866
12
36184
[5,20,98,180,412,806,1606,3070,5808,10798,19866, 36184]
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Last modified July 31 16:05 EDT 2024. Contains 374802 sequences. (Running on oeis4.)