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A293571 as a simple table

n a(n)
0 1
1 1
2 -1
3 -5
4 25
5 41
6 -1049
7 2899
8 54545
9 -610415
10 -1363409
11 92652011
12 -651996311
13 -10663181255
14 262674487895
15 -529402905149
16 -68312606260319
17 1136414207246369
18 7701376416944095
19 -584076369474366245
20 6461047290787787321
21 173442620419212050761

[1,1,-1,-5,25,41,-1049,2899,54545,-610415,
 -1363409,92652011,-651996311,-10663181255,
 262674487895,-529402905149,-68312606260319,
 1136414207246369,7701376416944095,
 -584076369474366245,6461047290787787321,
 173442620419212050761]

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Last modified August 2 06:17 EDT 2021. Contains 346409 sequences. (Running on oeis4.)