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A135925 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 -16
7 0
8 80
9 240
10 656
11 1936
12 6000
13 19088
14 61792
15 202832
16 673888
17 2263392
18 7677712
19 26280800
20 90709616
21 315486768
22 1104982560
23 3895248720
24 13813470240
25 49256281920
26 176536299168
27 635710344672
28 2299280127328
29 8350257302304
30 30441306959040

[0,0,0,0,0,0,-16,0,80,240,656,1936,6000,19088,
 61792,202832,673888,2263392,7677712,26280800,
 90709616,315486768,1104982560,3895248720,
 13813470240,49256281920,176536299168,635710344672,
 2299280127328,8350257302304,30441306959040]

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Last modified April 16 08:15 EDT 2024. Contains 371698 sequences. (Running on oeis4.)