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A336991 as a simple table

n a(n)
0 1
1 -1
2 -2
3 -3
4 -5
5 -10
6 -27
7 -91
8 -350
9 -1459
10 -6466
11 -30258
12 -149051
13 -771157
14 -4181702
15 -23718221
16 -140437759
17 -866481074
18 -5561061327
19 -37066185842
20 -256190732502
21 -1833581728979
22 -13571059095383
23 -103744579461855
24 -818183156375886
25 -6649600332967494
26 -55635988924348030

[1,-1,-2,-3,-5,-10,-27,-91,-350,-1459,-6466,
 -30258,-149051,-771157,-4181702,-23718221,
 -140437759,-866481074,-5561061327,-37066185842,
 -256190732502,-1833581728979,-13571059095383,
 -103744579461855,-818183156375886,
 -6649600332967494,-55635988924348030]

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Last modified July 16 17:03 EDT 2024. Contains 374358 sequences. (Running on oeis4.)