A281700 - OEIS

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A281700 as a simple table

n	a(n)
0	0
1	0
2	0
3	30
4	456
5	3396
6	14538
7	52840
8	150116
9	380336
10	860924
11	1839406
12	3551856
13	6684280
14	11834214
15	20108168
16	33051136
17	53176968

[0,0,0,30,456,3396,14538,52840,150116,380336, 860924,1839406,3551856,6684280,11834214,20108168, 33051136,53176968]