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A106632 as a simple table

n a(n)
0 -1
1 1
2 -25
3 49
4 -1
5 529
6 -1849
7 289
8 -9025
9 58081
10 -38809
11 108241
12 -1560001
13 2283121
14 -525625
15 35796289
16 -95863681
17 2666689
18 -681575449
19 3261894769
20 -1289169025
21 9906021841
22 -94109673529
23 99199171681
24 -84332740801
25 2327696411041
26 -4753075824025
27 46970592529
28 -48635546218561

[-1,1,-25,49,-1,529,-1849,289,-9025,58081,-38809,
 108241,-1560001,2283121,-525625,35796289,
 -95863681,2666689,-681575449,3261894769,
 -1289169025,9906021841,-94109673529,99199171681,
 -84332740801,2327696411041,-4753075824025,
 46970592529,-48635546218561]

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Last modified May 1 23:54 EDT 2024. Contains 372178 sequences. (Running on oeis4.)