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A109520 as a simple table

n a(n)
1 -1
2 -2
3 -14
4 -180
5 -3344
6 -80750
7 -2394792
8 -84150248
9 -3417051136
10 -157409163162
11 -8109659900000
12 -462005414448732
13 -28837128777928704
14 -1956971256267512966
15 -143459789419986793600
16 -11297467798871681250000
17 -951158499840260908777472

[-1,-2,-14,-180,-3344,-80750,-2394792,-84150248,
 -3417051136,-157409163162,-8109659900000,
 -462005414448732,-28837128777928704,
 -1956971256267512966,-143459789419986793600,
 -11297467798871681250000,
 -951158499840260908777472]

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Last modified March 28 09:01 EDT 2024. Contains 371236 sequences. (Running on oeis4.)