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A218966
as a simple table
n
a(n)
0
1
1
1
2
1
3
2
4
5
5
9
6
22
7
37
8
112
9
195
10
423
11
780
12
2401
13
4409
[1,1,1,2,5,9,22,37,112,195,423,780,2401,4409]