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A002968 as a simple table

n a(n)
0 1
1 1
2 0
3 1
4 8
5 22
6 51
7 342
8 2609
9 16896
10 99114
11 876579
12 8551800
13 79595269
14 764804085
15 8905825760

[1,1,0,1,8,22,51,342,2609,16896,99114,876579,
 8551800,79595269,764804085,8905825760]

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Last modified January 24 04:35 EST 2020. Contains 331183 sequences. (Running on oeis4.)