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A172518 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 100
6 576
7 2156
8 7168
9 17496
10 41600
11 82280
12 161280
13 280540
14 486080
15 774900
16 1232896
17 1844976
18 2757888
19 3933456
20 5606400
21 7699860
22 10570560
23 14081980
24 18754560
25 24365000
26 31647616
27 40258296
28 51204608
29 63979916

[0,0,0,0,100,576,2156,7168,17496,41600,82280,
 161280,280540,486080,774900,1232896,1844976,
 2757888,3933456,5606400,7699860,10570560,14081980,
 18754560,24365000,31647616,40258296,51204608,
 63979916]

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Last modified August 4 05:56 EDT 2020. Contains 336201 sequences. (Running on oeis4.)