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A078994 as a simple table

n a(n)
0 1
1 1
2 1
3 -2
4 -24
5 -138
6 -500
7 1200
8 56256
9 904912
10 11937696
11 144543360
12 1639736320
13 16965191808
14 141946949376
15 376837224448
16 -23412830208000
17 -860170849536000
18 -22132932250013696
19 -501053473607319552
20 -10543220910009286656
21 -208356118642682839040

[1,1,1,-2,-24,-138,-500,1200,56256,904912,
 11937696,144543360,1639736320,16965191808,
 141946949376,376837224448,-23412830208000,
 -860170849536000,-22132932250013696,
 -501053473607319552,-10543220910009286656,
 -208356118642682839040]

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Last modified July 7 03:00 EDT 2024. Contains 374062 sequences. (Running on oeis4.)