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A247399 as a simple table

na(n)
1200
2264
3340
4428
5528
6640
7864
81136
91456
101824
112240
123072
134096
145312
156720
168320
1711520
1815488
1920224
2025728
2132000
2244544
2360160
2478848
25100608
26125440
27175104
28237056
29311296
30397824
31496640
32694272
33941056
341236992
351582080

[200,264,340,428,528,640,864,1136,1456,1824,2240,
 3072,4096,5312,6720,8320,11520,15488,20224,25728,
 32000,44544,60160,78848,100608,125440,175104,
 237056,311296,397824,496640,694272,941056,1236992,
 1582080]