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A189412 as a simple table

n a(n)
1 0
2 0
3 24
4 720
5 6300
6 34812
7 135552
8 436944
9 1198968
10 2929656
11 6516984
12 13502448
13 26208516
14 48407988
15 85481280
16 145200888
17 238502808
18 380729160
19 591761304
20 899049096
21 1336994100
22 1950873276
23 2798226336
24 3952174032
25 5500597632
26 7555866072
27 10253438688

[0,0,24,720,6300,34812,135552,436944,1198968,
 2929656,6516984,13502448,26208516,48407988,
 85481280,145200888,238502808,380729160,591761304,
 899049096,1336994100,1950873276,2798226336,
 3952174032,5500597632,7555866072,10253438688]

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Last modified May 26 01:06 EDT 2013. Contains 225650 sequences.