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A294256 as a simple table

n a(n)
0 1
1 -1
2 -1
3 5
4 25
5 -41
6 -1769
7 7181
8 74705
9 -236305
10 -7562609
11 -4169771
12 1339186729
13 -2144219065
14 -174083994265
15 -370106105251
16 35885107199521
17 252732128552671
18 -10892824509622625
19 -56149731134394715
20 2589936417283432121
21 31565855231279227319

[1,-1,-1,5,25,-41,-1769,7181,74705,-236305,
 -7562609,-4169771,1339186729,-2144219065,
 -174083994265,-370106105251,35885107199521,
 252732128552671,-10892824509622625,
 -56149731134394715,2589936417283432121,
 31565855231279227319]

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Last modified February 26 06:43 EST 2024. Contains 370335 sequences. (Running on oeis4.)