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A184120 as a simple table

n a(n)
0 1
1 -3
2 8
3 -23
4 70
5 -218
6 688
7 -2195
8 7062
9 -22866
10 74416
11 -243206
12 797660
13 -2624004
14 8654304
15 -28607171
16 94748774
17 -314361682
18 1044625200
19 -3476135186
20 11581870900
21 -38632753228
22 128998096032
23 -431144781486
24 1442252806012

[1,-3,8,-23,70,-218,688,-2195,7062,-22866,74416,
 -243206,797660,-2624004,8654304,-28607171,
 94748774,-314361682,1044625200,-3476135186,
 11581870900,-38632753228,128998096032,
 -431144781486,1442252806012]

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Last modified December 10 12:30 EST 2019. Contains 329895 sequences. (Running on oeis4.)