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A303394 as a simple table

n a(n)
0 1
1 -2
2 -6
3 -28
4 -26
5 -156
6 -476
7 968
8 11526
9 -16172
10 139724
11 791928
12 1315548
13 12772840
14 31004424
15 -105335920
16 1058225606
17 2239259700
18 -3700870212
19 29301955992
20 -4944685836
21 -526686535112
22 1134044530040
23 4057865621232
24 -13063873857124
25 -113573062924024

[1,-2,-6,-28,-26,-156,-476,968,11526,-16172,
 139724,791928,1315548,12772840,31004424,
 -105335920,1058225606,2239259700,-3700870212,
 29301955992,-4944685836,-526686535112,
 1134044530040,4057865621232,-13063873857124,
 -113573062924024]

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)