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A177755 as a simple table

na(n)
10
24
318
480
5200
6468
7882
81600
92592
104100
116050
128784
1312168
1416660
1522050
1628928
1736992
1846980
1958482
2072400
2188200
22106964
23128018
24152640
25180000

[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]