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A009097 as a simple table

n a(n)
0 1
1 0
2 -2
3 3
4 -3
5 10
6 -56
7 315
8 -1971
9 13788
10 -105246
11 857615
12 -7266223
13 61296222
14 -465353292
15 1982748495
16 36246192441
17 -1600097656520
18 43901543199046
19 -1078930450441413
20 25757481055625541
21 -615789512284527630

[1,0,-2,3,-3,10,-56,315,-1971,13788,-105246,
 857615,-7266223,61296222,-465353292,1982748495,
 36246192441,-1600097656520,43901543199046,
 -1078930450441413,25757481055625541,
 -615789512284527630]

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Last modified March 1 08:46 EST 2024. Contains 370430 sequences. (Running on oeis4.)