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A228073 as a simple table

n a(n)
0 -2
1 0
2 0
3 192
4 3402
5 0
6 196272
7 917568
8 0
9 11327232
10 32453136
11 0
12 200946468
13 447835392
14 0
15 1873218816
16 3568293162
17 0
18 11587373280
19 19916839872
20 0
21 54185699328
22 86195929680
23 0
24 205762215024
25 309802123008
26 0
27 668839597248
28 961259741172
29 0
30 1916372334240
31 2662571684160
32 0
33 4975266781440
34 6699605038272
35 0
36 11865484014132
37 15620739902208
38 0
39 26444647324032
40 34029871628112
41 0
42 55430090586720
43 70205139813312
44 0
45 110613834846720
46 137669694779232
47 0

[-2,0,0,192,3402,0,196272,917568,0,11327232,
 32453136,0,200946468,447835392,0,1873218816,
 3568293162,0,11587373280,19916839872,0,
 54185699328,86195929680,0,205762215024,
 309802123008,0,668839597248,961259741172,0,
 1916372334240,2662571684160,0,4975266781440,
 6699605038272,0,11865484014132,15620739902208,0,
 26444647324032,34029871628112,0,55430090586720,
 70205139813312,0,110613834846720,137669694779232,
 0]

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Last modified September 25 09:46 EDT 2022. Contains 356977 sequences. (Running on oeis4.)