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A237904 as a simple table

na(n)
1256
21768
31768
412441
521410
612441
788964
8265306
9265306
1088964
11636720
123351086
135825366
143351086
15636720
164539422
1742195634
18130240640
19130240640
2042195634
214539422
2232392585
23529992314
242894506130
255180304200
262894506130

[256,1768,1768,12441,21410,12441,88964,265306,
 265306,88964,636720,3351086,5825366,3351086,
 636720,4539422,42195634,130240640,130240640,
 42195634,4539422,32392585,529992314,2894506130,
 5180304200,2894506130]