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A248505 as a simple table

n a(n)
1 3
2 2
3 -1
4 -2
5 -1
6 2
7 3
8 6
9 3
10 18
11 15
12 270
13 255
14 68850
15 68595
16 4722765750
17 4722697155
18 22304192371256441250
19 22304192366533744095
20 497476997228678085728479670747901918750
21 497476997228678085706175478381368174655

[3,2,-1,-2,-1,2,3,6,3,18,15,270,255,68850,68595,
 4722765750,4722697155,22304192371256441250,
 22304192366533744095,
 497476997228678085728479670747901918750,
 497476997228678085706175478381368174655]

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Last modified September 21 07:28 EDT 2021. Contains 347596 sequences. (Running on oeis4.)