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A084209 as a simple table

n a(n)
0 1
1 1
2 -3
3 15
4 -85
5 523
6 -3367
7 22371
8 -152104
9 1052568
10 -7385756
11 52410754
12 -375382683
13 2709626768
14 -19688989762
15 143885743077
16 -1056748051734
17 7795106129504
18 -57723430872280
19 428923406694402

[1,1,-3,15,-85,523,-3367,22371,-152104,1052568,
 -7385756,52410754,-375382683,2709626768,
 -19688989762,143885743077,-1056748051734,
 7795106129504,-57723430872280,428923406694402]

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Last modified November 30 02:42 EST 2020. Contains 338781 sequences. (Running on oeis4.)