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A198314 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 0
6 1
7 0
8 4
9 1
10 8
11 3
12 37
13 33
14 335
15 1610
16 17985
17 193911
18 2867313
19 32674066
20 1581626531
21 6705889862

[0,0,0,0,1,0,1,0,4,1,8,3,37,33,335,1610,17985,
 193911,2867313,32674066,1581626531,6705889862]

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Last modified February 24 10:37 EST 2020. Contains 332209 sequences. (Running on oeis4.)