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A142585 as a simple table

n a(n)
0 1
1 0
2 1
3 0
4 -1
5 5
6 -14
7 35
8 -81
9 180
10 -389
11 825
12 -1726
13 3575
14 -7349
15 15020
16 -30561
17 61965
18 -125294
19 252795
20 -509161
21 1024100
22 -2057549
23 4130225
24 -8284926
25 16609455
26 -33282989
27 66669660
28 -133507081
29 267285605
30 -535010414
31 1070731475
32 -2142612801
33 4287086100

[1,0,1,0,-1,5,-14,35,-81,180,-389,825,-1726,3575,
 -7349,15020,-30561,61965,-125294,252795,-509161,
 1024100,-2057549,4130225,-8284926,16609455,
 -33282989,66669660,-133507081,267285605,
 -535010414,1070731475,-2142612801,4287086100]

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Last modified January 23 01:30 EST 2020. Contains 331166 sequences. (Running on oeis4.)