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A307497 as a simple table

n a(n)
0 1
1 -1
2 5
3 -32
4 294
5 -3527
6 51589
7 -894706
8 17978610
9 -410803143
10 10517824035
11 -298204099693
12 9273022031794
13 -313755862498513
14 11474175971184267
15 -450960476552715192
16 18954545423649435646
17 -848383466771831169101
18 40285210722052785437974

[1,-1,5,-32,294,-3527,51589,-894706,17978610,
 -410803143,10517824035,-298204099693,
 9273022031794,-313755862498513,11474175971184267,
 -450960476552715192,18954545423649435646,
 -848383466771831169101,40285210722052785437974]

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Last modified January 20 19:53 EST 2020. Contains 331096 sequences. (Running on oeis4.)