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A156420 as a simple table

n a(n)
0 1
1 0
2 0
3 30693320
4 1890254100
5 0
6 0
7 686163316440
8 4354347220860
9 0
10 0
11 141370447642494
12 817218706478195
13 0
14 0 

[1,0,0,30693320,1890254100,0,0,686163316440,
 4354347220860,0,0,141370447642494,817218706478195,
 0,0]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)