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A077461
as a simple table
n
a(n)
1
2
2
14
3
82
4
478
5
2786
6
16238
7
94642
8
551614
9
3215042
10
18738638
11
109216786
[2,14,82,478,2786,16238,94642,551614,3215042, 18738638,109216786]