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A083406 as a simple table

na(n)
163504
2435600
36350400
47683984
516240900
625401600
743560000
866585600
9420332004
10558471424
11635040000
12647804304
13726949444
14768398400
15782432784
161067328900
171624090000
181897473600
192341011456
202540160000

[63504,435600,6350400,7683984,16240900,25401600,
 43560000,66585600,420332004,558471424,635040000,
 647804304,726949444,768398400,782432784,
 1067328900,1624090000,1897473600,2341011456,
 2540160000]