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A131313 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 1
6 15
7 1085
8 216230
9 92550276
10 74358276300
11 102660061574400
12 228311514581611725
13 777903709095959606875
14 3900045557544532389044051
15 27829438251904221299882526375
16 274842860343937013061411903607000
17 3668195394384971166861021308091920000

[0,0,0,1,1,15,1085,216230,92550276,74358276300,
 102660061574400,228311514581611725,
 777903709095959606875,3900045557544532389044051,
 27829438251904221299882526375,
 274842860343937013061411903607000,
 3668195394384971166861021308091920000]

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Last modified April 24 19:06 EDT 2024. Contains 371962 sequences. (Running on oeis4.)