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A012650 as a simple table

n a(n)
0 0
1 0
2 2
3 -3
4 0
5 -10
6 40
7 504
8 -2352
9 -4824
10 -182912
11 3899720
12 -27876640
13 234373776
14 -5435914640
15 91625675400
16 -1149581257216
17 18172484297792
18 -366469643887104
19 6826755069373824
20 -123759250799610112

[0,0,2,-3,0,-10,40,504,-2352,-4824,-182912,
 3899720,-27876640,234373776,-5435914640,
 91625675400,-1149581257216,18172484297792,
 -366469643887104,6826755069373824,
 -123759250799610112]

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)