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A246615 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 5040
9 362880
10 18144000
11 804988800
12 34488115200
13 1482082842240
14 65120246231040
15 2955402450000000
16 139297568464454400
17 6837892496270035200
18 350034595015623598080
19 18692451288585606954240
20 1041114148173066240000000

[1,0,0,0,0,0,0,0,5040,362880,18144000,804988800,
 34488115200,1482082842240,65120246231040,
 2955402450000000,139297568464454400,
 6837892496270035200,350034595015623598080,
 18692451288585606954240,1041114148173066240000000]

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Last modified May 28 03:28 EDT 2022. Contains 354110 sequences. (Running on oeis4.)