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A228931 as a simple table

n a(n)
1 2
2 -6
3 34
4 1154
5 1331714
6 1773462177794
7 3145168096065837266706434
8 9892082352510403757550172975146702122837936996354

[2,-6,34,1154,1331714,1773462177794,
 3145168096065837266706434,
 9892082352510403757550172975146702122837936996354]

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Last modified January 22 19:16 EST 2020. Contains 331153 sequences. (Running on oeis4.)