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A217477 as a simple table

n a(n)
0 3
1 -4
2 12
3 -40
4 140
5 -504
6 1848
7 -6864
8 25740
9 -97240
10 369512
11 -1410864
12 5408312
13 -20801200
14 80233200
15 -310235040
16 1202160780
17 -4667212440
18 18150270600
19 -70690527600
20 275693057640
21 -1076515748880
22 4208197927440
23 -16466861455200

[3,-4,12,-40,140,-504,1848,-6864,25740,-97240,
 369512,-1410864,5408312,-20801200,80233200,
 -310235040,1202160780,-4667212440,18150270600,
 -70690527600,275693057640,-1076515748880,
 4208197927440,-16466861455200]

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Last modified May 13 09:49 EDT 2024. Contains 372504 sequences. (Running on oeis4.)