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A202038 as a simple table

n a(n)
0 1
1 -1
2 -1
3 5
4 17
5 -121
6 -721
7 6845
8 58337
9 -698161
10 -7734241
11 111973685
12 1526099057
13 -25947503401
14 -419784870961
15 8200346492525
16 153563504618177
17 -3389281372287841
18 -72104198836466881
19 1774459993676715365
20 42270463533824671697

[1,-1,-1,5,17,-121,-721,6845,58337,-698161,
 -7734241,111973685,1526099057,-25947503401,
 -419784870961,8200346492525,153563504618177,
 -3389281372287841,-72104198836466881,
 1774459993676715365,42270463533824671697]

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Last modified April 16 04:17 EDT 2024. Contains 371696 sequences. (Running on oeis4.)