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A156093 as a simple table

n a(n)
0 0
1 -1
2 48
3 -2256
4 105985
5 -4979040
6 233908896
7 -10988739073
8 516236827536
9 -24252142155120
10 1139334444463105
11 -53524466747610816
12 2514510602693245248
13 -118128473859834915841
14 5549523760809547799280
15 -260709488284188911650320

[0,-1,48,-2256,105985,-4979040,233908896,
 -10988739073,516236827536,-24252142155120,
 1139334444463105,-53524466747610816,
 2514510602693245248,-118128473859834915841,
 5549523760809547799280,-260709488284188911650320]

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Last modified June 24 00:04 EDT 2021. Contains 345403 sequences. (Running on oeis4.)