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A213140 as a simple table

n a(n)
0 1
1 -3
2 -15
3 69
4 2505
5 10077
6 -716415
7 -14740491
8 213018105
9 15676762317
10 98170027185
11 -17112616737051
12 -553855541534295
13 15477991707447357
14 1557738998240770785
15 10238839745149426389
16 -3849999044450765494695

[1,-3,-15,69,2505,10077,-716415,-14740491,
 213018105,15676762317,98170027185,-17112616737051,
 -553855541534295,15477991707447357,
 1557738998240770785,10238839745149426389,
 -3849999044450765494695]

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Last modified January 20 17:05 EST 2019. Contains 319335 sequences. (Running on oeis4.)