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A156228 as a simple table

n a(n)
1 1
2 0
3 1
4 1
5 4
6 7
7 31
8 98
9 446
10 1894
11 9049
12 43151

[1,0,1,1,4,7,31,98,446,1894,9049,43151]

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Last modified May 30 05:03 EDT 2016. Contains 273513 sequences.