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A108931 as a simple table

n a(n)
0 0
1 1
2 -3
3 8
4 -18
5 47
6 -105
7 274
8 -612
9 1597
10 -3567
11 9308
12 -20790
13 54251
14 -121173
15 316198
16 -706248
17 1842937
18 -4116315
19 10741424
20 -23991642
21 62605607
22 -139833537
23 364892218
24 -815009580
25 2126747701
26 -4750223943
27 12395593988
28 -27686334078
29 72246816227

[0,1,-3,8,-18,47,-105,274,-612,1597,-3567,9308,
 -20790,54251,-121173,316198,-706248,1842937,
 -4116315,10741424,-23991642,62605607,-139833537,
 364892218,-815009580,2126747701,-4750223943,
 12395593988,-27686334078,72246816227]

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Last modified March 7 12:19 EST 2021. Contains 341885 sequences. (Running on oeis4.)