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A171685 as a simple table

n a(n)
0 1
1 -1
2 2
3 -7
4 -2
5 2
6 -83
7 -42
8 -6
9 4
10 -266
11 -332
12 -84
13 -8
14 4
15 5666
16 -2660
17 -1660
18 -280
19 -20
20 8
21 146762
22 33996
23 -7980
24 -3320
25 -420
26 -24
27 8
28 3415978
29 2054668
30 237972
31 -37240
32 -11620
33 -1176
34 -56
35 16
36 7599256
37 27327824
38 8218672
39 634592
40 -74480

[1,-1,2,-7,-2,2,-83,-42,-6,4,-266,-332,-84,-8,4,
 5666,-2660,-1660,-280,-20,8,146762,33996,-7980,
 -3320,-420,-24,8,3415978,2054668,237972,-37240,
 -11620,-1176,-56,16,7599256,27327824,8218672,
 634592,-74480]

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Last modified February 4 14:43 EST 2023. Contains 360055 sequences. (Running on oeis4.)