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A009660 as a simple table

n a(n)
0 1
1 -1
2 -7
3 447
4 -19471
5 612127
6 37384233
7 -15027743521
8 3099354722529
9 -493631745542209
10 34013990822822489
11 22054949830590352511
12 -16492842082602835130159
13 7774163613641172354365407

[1,-1,-7,447,-19471,612127,37384233,-15027743521,
 3099354722529,-493631745542209,34013990822822489,
 22054949830590352511,-16492842082602835130159,
 7774163613641172354365407]

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Last modified April 19 08:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)