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A007218 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 -2
5 0
6 28
7 -64
8 39
9 224
10 -884
11 1368
12 1350
13 -12272
14 28752
15 -11944
16 -138873
17 494184
18 -640856
19 -1111568
20 7363194
21 -15488224
22 1198848
23 93506112
24 -293473869

[1,0,0,0,-2,0,28,-64,39,224,-884,1368,1350,-12272,
 28752,-11944,-138873,494184,-640856,-1111568,
 7363194,-15488224,1198848,93506112,-293473869]

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Last modified October 17 03:38 EDT 2019. Contains 328106 sequences. (Running on oeis4.)