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A238087 as a simple table

n a(n)
0 -1
1 1
2 -1
3 1
4 -5
5 63
6 -315
7 99
8 -675675
9 135135
10 -1640925
11 83329155
12 -4583103525
13 5791834125
14 -71152682225625
15 14230536445125
16 -26797763435625
17 24833960277501375
18 -73881031825566590625
19 8546099690638125
20 -106610328924292590271875

[-1,1,-1,1,-5,63,-315,99,-675675,135135,-1640925,
 83329155,-4583103525,5791834125,-71152682225625,
 14230536445125,-26797763435625,24833960277501375,
 -73881031825566590625,8546099690638125,
 -106610328924292590271875]

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Last modified April 25 06:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)