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A000953
as a simple table
n
a(n)
7
1
8
5
9
24
10
109
11
465
12
1943
13
7827
14
31095
15
121356
16
469235
17
1797376
18
6844290
19
25928036
[1,5,24,109,465,1943,7827,31095,121356,469235, 1797376,6844290,25928036]