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A280434 as a simple table

na(n)
10
24
321
480
5225
6548
71211
82512
94989
109604
1118073
1233432
1361035
14110276
15197581
16351568
17621945

[0,4,21,80,225,548,1211,2512,4989,9604,18073,
 33432,61035,110276,197581,351568,621945]