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A001607 as a simple table

n a(n)
0 0
1 1
2 -1
3 -1
4 3
5 -1
6 -5
7 7
8 3
9 -17
10 11
11 23
12 -45
13 -1
14 91
15 -89
16 -93
17 271
18 -85
19 -457
20 627
21 287
22 -1541
23 967
24 2115
25 -4049
26 -181
27 8279
28 -7917
29 -8641
30 24475
31 -7193
32 -41757
33 56143
34 27371
35 -139657
36 84915
37 194399
38 -364229
39 -24569
40 753027
41 -703889

[0,1,-1,-1,3,-1,-5,7,3,-17,11,23,-45,-1,91,-89,
 -93,271,-85,-457,627,287,-1541,967,2115,-4049,
 -181,8279,-7917,-8641,24475,-7193,-41757,56143,
 27371,-139657,84915,194399,-364229,-24569,753027,
 -703889]

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Last modified March 29 05:43 EDT 2024. Contains 371264 sequences. (Running on oeis4.)