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A012660 as a simple table

n a(n)
0 0
1 1
2 2
3 -1
4 -28
5 -115
6 422
7 10859
8 62792
9 -658855
10 -17714998
11 -105832681
12 2697504812
13 73345212005
14 348796937582
15 -22580196404221
16 -608734768217968
17 -1123101121107535
18 335099557538486162
19 8749237741065576239
20 -28959745091935025548
21 -8005533865658264577475

[0,1,2,-1,-28,-115,422,10859,62792,-658855,
 -17714998,-105832681,2697504812,73345212005,
 348796937582,-22580196404221,-608734768217968,
 -1123101121107535,335099557538486162,
 8749237741065576239,-28959745091935025548,
 -8005533865658264577475]

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Last modified April 24 11:40 EDT 2024. Contains 371936 sequences. (Running on oeis4.)