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A012145 as a simple table

n a(n)
0 1
1 -1
2 -7
3 -169
4 -9199
5 -915441
6 -146524599
7 -34565815257
8 -11286151088991
9 -4868161148587617
10 -2677533017865604839
11 -1826930427561513127305
12 -1513046625847449915823695
13 -1494316021415982844933350225

[1,-1,-7,-169,-9199,-915441,-146524599,
 -34565815257,-11286151088991,-4868161148587617,
 -2677533017865604839,-1826930427561513127305,
 -1513046625847449915823695,
 -1494316021415982844933350225]

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Last modified December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)