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A309085 as a simple table

n a(n)
0 1
1 -4
2 12
3 -20
4 -20
5 172
6 108
7 -2388
8 -3220
9 47532
10 161900
11 -1062740
12 -8532628
13 13623212
14 431041132
15 1206169260
16 -17833021588
17 -169685043796
18 180187176044
19 13462762665132
20 79377664422252
21 -553096696140884
22 -11670986989785492
23 -44371854928405844
24 829755609457185644

[1,-4,12,-20,-20,172,108,-2388,-3220,47532,161900,
 -1062740,-8532628,13623212,431041132,1206169260,
 -17833021588,-169685043796,180187176044,
 13462762665132,79377664422252,-553096696140884,
 -11670986989785492,-44371854928405844,
 829755609457185644]

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Last modified October 21 04:40 EDT 2019. Contains 328291 sequences. (Running on oeis4.)