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A355840 as a simple table

na(n)
18
264
3316
4852
52252
63780
78140
812280
920172
1028592
1145988
1255508
1387588
14107652
15141060
16181312
17246844
18278352
19380108
20424096
21530764
22638564
23799148
24854448
251082244
261235048
271442572
281612088
291975908
302051784
312565956
322773616
333164916
343566256
353997652
364271136
375137452
385537756

[8,64,316,852,2252,3780,8140,12280,20172,28592,
 45988,55508,87588,107652,141060,181312,246844,
 278352,380108,424096,530764,638564,799148,854448,
 1082244,1235048,1442572,1612088,1975908,2051784,
 2565956,2773616,3164916,3566256,3997652,4271136,
 5137452,5537756]