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A006927 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 1
13 3
14 21
15 545
16 30368
17 1782839
18 95079080
19 4686063107

[0,0,0,0,0,0,0,0,0,0,0,0,1,3,21,545,30368,1782839,
 95079080,4686063107]

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)