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A012775 as a simple table

n a(n)
0 0
1 1
2 -1
3 3
4 0
5 -37
6 345
7 -1967
8 2296
9 122093
10 -2157165
11 21241847
12 -62837544
13 -2704412921
14 74329911565
15 -1080320786971
16 5480675823120
17 220652162236409
18 -8577532338045273
19 168598543971458059
20 -1306206271210775920
21 -46736993299592412013

[0,1,-1,3,0,-37,345,-1967,2296,122093,-2157165,
 21241847,-62837544,-2704412921,74329911565,
 -1080320786971,5480675823120,220652162236409,
 -8577532338045273,168598543971458059,
 -1306206271210775920,-46736993299592412013]

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Last modified June 2 04:34 EDT 2023. Contains 363081 sequences. (Running on oeis4.)