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A279370 as a simple table

n a(n)
0 1
1 -1
2 -1
3 -17
4 -31
5 -691
6 -5461
7 -929569
8 -3202291
9 -221930581
10 -4722116521
11 -56963745931
12 -14717667114151
13 -2093660879252671
14 -86125672563201181
15 -129848163681107301953
16 -868320396104950823611
17 -209390615747646519456961
18 -14129659550745551130667441

[1,-1,-1,-17,-31,-691,-5461,-929569,-3202291,
 -221930581,-4722116521,-56963745931,
 -14717667114151,-2093660879252671,
 -86125672563201181,-129848163681107301953,
 -868320396104950823611,-209390615747646519456961,
 -14129659550745551130667441]

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Last modified May 26 10:17 EDT 2022. Contains 354086 sequences. (Running on oeis4.)