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A335868 as a simple table

n a(n)
0 1
1 -2
2 7
3 -31
4 149
5 -631
6 475
7 43210
8 -844727
9 10960505
10 -86569889
11 -584746911
12 46302579229
13 -1304510879686
14 25366896568707
15 -277053418780891
16 -4271166460501743
17 384590020131637825
18 -14617527176248527545
19 380117694164438489422
20 -5265650620303861935579

[1,-2,7,-31,149,-631,475,43210,-844727,10960505,
 -86569889,-584746911,46302579229,-1304510879686,
 25366896568707,-277053418780891,-4271166460501743,
 384590020131637825,-14617527176248527545,
 380117694164438489422,-5265650620303861935579]

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Last modified June 14 08:31 EDT 2021. Contains 345018 sequences. (Running on oeis4.)