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A277445 as a simple table

n a(n)
1 1
2 -2
3 -4
4 4
5 48
6 -160
7 -32
8 2176
9 6912
10 0
11 -273408
12 41984
13 19456
14 -37027840
15 -141705216
16 0
17 3833856
18 -34359869440
19 0
20 1625620480000
21 11045440585728
22 -47710208
23 -520279482695680
24 7719016726528
25 909115392000
26 -207717914210467840
27 0
28 0
29 100736516652659638272
30 -721057900040447590400

[1,-2,-4,4,48,-160,-32,2176,6912,0,-273408,41984,
 19456,-37027840,-141705216,0,3833856,-34359869440,
 0,1625620480000,11045440585728,-47710208,
 -520279482695680,7719016726528,909115392000,
 -207717914210467840,0,0,100736516652659638272,
 -721057900040447590400]

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Last modified July 28 13:49 EDT 2024. Contains 374696 sequences. (Running on oeis4.)