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A002930 as a simple table

n a(n)
0 1
1 0
2 -2
3 -8
4 -26
5 -80
6 -268
7 -944
8 -3474
9 -13072
10 -49672
11 -191272
12 -744500
13 -2924680
14 -11596284
15 -46364456

[1,0,-2,-8,-26,-80,-268,-944,-3474,-13072,-49672,
 -191272,-744500,-2924680,-11596284,-46364456]

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Last modified March 18 17:51 EDT 2019. Contains 321292 sequences. (Running on oeis4.)