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A098537 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 6
5 -6
6 6
7 -6
8 78
9 -150
10 222
11 -294
12 1374
13 -3462
14 6558
15 -10662
16 30894
17 -82374
18 180222
19 -339558
20 811374
21 -2082534
22 4875774
23 -10149702
24 22872750
25 -55797126
26 133232766
27 -294821286
28 660771438
29 -1558556070
30 3711070590

[1,0,0,0,6,-6,6,-6,78,-150,222,-294,1374,-3462,
 6558,-10662,30894,-82374,180222,-339558,811374,
 -2082534,4875774,-10149702,22872750,-55797126,
 133232766,-294821286,660771438,-1558556070,
 3711070590]

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Last modified January 26 14:08 EST 2020. Contains 331280 sequences. (Running on oeis4.)