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A174565 as a simple table

n a(n)
0 1
1 1
2 -3
3 9
4 -11
5 1
6 45
7 -135
8 229
9 -143
10 -483
11 2025
12 -4139
13 4321
14 3597
15 -28071
16 69829
17 -97199
18 12285
19 351945
20 -1104971
21 1907137
22 -1301523
23 -3723975
24 16378021
25 -34238159
26 37202397
27 25345449
28 -224845931
29 573156001
30 -820084275
31 167628825
32 2777450629
33 -9002867183

[1,1,-3,9,-11,1,45,-135,229,-143,-483,2025,-4139,
 4321,3597,-28071,69829,-97199,12285,351945,
 -1104971,1907137,-1301523,-3723975,16378021,
 -34238159,37202397,25345449,-224845931,573156001,
 -820084275,167628825,2777450629,-9002867183]

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Last modified October 28 04:43 EDT 2021. Contains 348313 sequences. (Running on oeis4.)