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A009448 as a simple table

n a(n)
0 0
1 1
2 2
3 2
4 -8
5 -84
6 -504
7 -2304
8 -6656
9 15760
10 484000
11 5348320
12 44393856
13 288642368
14 1137006976
15 -5372233216
16 -195241910272
17 -2961479980800
18 -34259767672320
19 -320473550808576
20 -2158264400250880
21 -1727938748171264
22 278774033845987328

[0,1,2,2,-8,-84,-504,-2304,-6656,15760,484000,
 5348320,44393856,288642368,1137006976,-5372233216,
 -195241910272,-2961479980800,-34259767672320,
 -320473550808576,-2158264400250880,
 -1727938748171264,278774033845987328]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)