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A373922
as a simple table
n
a(n)
0
1
1
1
2
1
3
1
4
2
5
4
6
11
7
33
8
129
9
577
10
3113
11
19092
12
132318
13
1011665
[1,1,1,1,2,4,11,33,129,577,3113,19092,132318, 1011665]