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A294257 as a simple table

n a(n)
0 1
1 -1
2 -1
3 5
4 1
5 199
6 -1409
7 -4579
8 25985
9 23759
10 13872511
11 -129511691
12 -1050605951
13 4703204375
14 33833371391
15 6781977225869
16 -71864943455999
17 -926469142419809
18 -2738986440688385
19 11032808190085349
20 16738876153047304961
21 -146356319119622810521

[1,-1,-1,5,1,199,-1409,-4579,25985,23759,13872511,
 -129511691,-1050605951,4703204375,33833371391,
 6781977225869,-71864943455999,-926469142419809,
 -2738986440688385,11032808190085349,
 16738876153047304961,-146356319119622810521]

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Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)