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A156255 as a simple table

n a(n)
0 1
1 -1
2 -20
3 121
4 2020
5 -10201
6 -498860
7 14111177
8 229352740
9 -2085384391
10 -169413817100
11 3765413859931
12 183531216526660
13 -2410430851171981
14 -274136470848578540
15 33234524120454778969
16 539962197767023975780
17 -9273713631027601262971

[1,-1,-20,121,2020,-10201,-498860,14111177,
 229352740,-2085384391,-169413817100,3765413859931,
 183531216526660,-2410430851171981,
 -274136470848578540,33234524120454778969,
 539962197767023975780,-9273713631027601262971]

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Last modified April 24 11:21 EDT 2024. Contains 371936 sequences. (Running on oeis4.)