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A348764
as a simple table
n
a(n)
1
2
2
6
3
29
4
153
5
1015
6
7572
7
62316
8
548575
9
5069705
10
48490576
11
475784885
12
4760060954
13
48363620851
14
497636022164
[2,6,29,153,1015,7572,62316,548575,5069705, 48490576,475784885,4760060954,48363620851, 497636022164]