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A015690 as a simple table

n a(n)
0 1
1 -13
2 195
3 -3315
4 62673
5 -1299285
6 29228355
7 -707636475
8 18316505025
9 -504116658045
10 14685387955875
11 -451033728019875
12 14555826008348625
13 -492141539705941125
14 17387673626552904675
15 -640456882350467056875

[1,-13,195,-3315,62673,-1299285,29228355,
 -707636475,18316505025,-504116658045,
 14685387955875,-451033728019875,14555826008348625,
 -492141539705941125,17387673626552904675,
 -640456882350467056875]

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Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)