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A053285 as a simple table

na(n)
01
12
24
36
416
520
648
784
8256
9324
10800
111364
123840
135460
1412544
1519800
1665536
1787380
18186624
19349524
20986880
211365336
223345408
235592404
2416515072
2520250000
2652306176
2784768120
28252645120
29351847488
30760320000
311431655764
324288266240

[1,2,4,6,16,20,48,84,256,324,800,1364,3840,5460,
 12544,19800,65536,87380,186624,349524,986880,
 1365336,3345408,5592404,16515072,20250000,
 52306176,84768120,252645120,351847488,760320000,
 1431655764,4288266240]