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A009673 as a simple table

n a(n)
0 0
1 2
2 -4
3 246
4 -6728
5 614890
6 -55387212
7 8450249822
8 -1527219657616
9 372125006557650
10 -109398463655126420
11 39693749843486489542
12 -17074884680310522056664
13 8684084243275368565840826

[0,2,-4,246,-6728,614890,-55387212,8450249822,
 -1527219657616,372125006557650,
 -109398463655126420,39693749843486489542,
 -17074884680310522056664,
 8684084243275368565840826]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)