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A180878 as a simple table

n a(n)
1 1
2 0
3 -1
4 -1
5 -9
6 -5
7 -21
8 -21
9 -197
10 -117
11 -427
12 -427
13 -2501
14 -1797
15 -2909
16 -2909
17 -72877
18 -65453

[1,0,-1,-1,-9,-5,-21,-21,-197,-117,-427,-427,
 -2501,-1797,-2909,-2909,-72877,-65453]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)