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A065930 as a simple table

na(n)
04
179
21575
331420
4626824
512505059
6249474355
74976982040
899290166444
91980826346839
1039517236770335
11788363909059860
1215727760944426864
13313766854979477419
146259609338645121515
15124878419917922952880

[4,79,1575,31420,626824,12505059,249474355,
 4976982040,99290166444,1980826346839,
 39517236770335,788363909059860,15727760944426864,
 313766854979477419,6259609338645121515,
 124878419917922952880]