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A293347
as a simple table
n
a(n)
0
1
1
1
2
2
3
5
4
14
5
42
6
126
7
383
8
1178
9
3640
10
11316
11
35263
12
110376
[1,1,2,5,14,42,126,383,1178,3640,11316,35263, 110376]