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A367316
as a simple table
n
a(n)
0
1
1
2
2
8
3
45
4
307
5
2385
6
20362
7
186812
8
1814156
9
18448851
10
194918129
11
2126727740
[1,2,8,45,307,2385,20362,186812,1814156,18448851, 194918129,2126727740]