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A009235 as a simple table

n a(n)
0 1
1 1
2 -1
3 -1
4 9
5 -23
6 -25
7 583
8 -3087
9 4401
10 79087
11 -902097
12 4783801
13 2361049
14 -348382697
15 4102879415
16 -24288551071
17 -47413121055
18 3214104039007
19 -44472852461857
20 326386562502889
21 417716032223049
22 -55104307651136313
23 962111031220099495

[1,1,-1,-1,9,-23,-25,583,-3087,4401,79087,-902097,
 4783801,2361049,-348382697,4102879415,
 -24288551071,-47413121055,3214104039007,
 -44472852461857,326386562502889,417716032223049,
 -55104307651136313,962111031220099495]

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Last modified August 21 21:14 EDT 2024. Contains 375353 sequences. (Running on oeis4.)