A177755 - OEIS

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A177755 as a simple table

n	a(n)
1	0
2	4
3	18
4	80
5	200
6	468
7	882
8	1600
9	2592
10	4100
11	6050
12	8784
13	12168
14	16660
15	22050
16	28928
17	36992
18	46980
19	58482
20	72400
21	88200
22	106964
23	128018
24	152640
25	180000

[0,4,18,80,200,468,882,1600,2592,4100,6050,8784, 12168,16660,22050,28928,36992,46980,58482,72400, 88200,106964,128018,152640,180000]