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A179957 as a simple table

n a(n)
0 1
1 1
2 0
3 0
4 0
5 0
6 0
7 0
8 2
9 72
10 1496
11 25384
12 399848
13 6231544
14 99133496
15 1634227958
16 28120703888
17 506599465896
18 9562489659952
19 189055933191880
20 3911226769004280

[1,1,0,0,0,0,0,0,2,72,1496,25384,399848,6231544,
 99133496,1634227958,28120703888,506599465896,
 9562489659952,189055933191880,3911226769004280]

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)