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A258780 as a simple table

na(n)
28
312
4140
564
62236
7196
81300
91600
106256
115084
12248756
13246196
14484400
1536680
16887884
17821836
181559116
19104120
20126072244
219586736
224156840
23542759984
241017981724
252744780140
26405793096
27148647496
281671024916

[8,12,140,64,2236,196,1300,1600,6256,5084,248756,
 246196,484400,36680,887884,821836,1559116,104120,
 126072244,9586736,4156840,542759984,1017981724,
 2744780140,405793096,148647496,1671024916]