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A246759 as a simple table

na(n)
10
22
39
448
5324
61280
73750
89072
919208
1036864
1150625
1265610
1382944
14110000
15175692
16269568
17399854
18576240
19810000
201114112
211503378
221994544
232606420
243360000
254278582
265387888
276716184
288294400

[0,2,9,48,324,1280,3750,9072,19208,36864,50625,
 65610,82944,110000,175692,269568,399854,576240,
 810000,1114112,1503378,1994544,2606420,3360000,
 4278582,5387888,6716184,8294400]