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A028814 as a simple table

na(n)
01
15
220
378
4307
51219
64862
719428
877685
9310705
101242776
114971050
1219884135
1379536463
14318145762
151272582944
165090331657
1720361326493
1881445305820
19325781223110
201303124892251
215212499568795
2220849998274950
2383399993099548
24333599972397917

[1,5,20,78,307,1219,4862,19428,77685,310705,
 1242776,4971050,19884135,79536463,318145762,
 1272582944,5090331657,20361326493,81445305820,
 325781223110,1303124892251,5212499568795,
 20849998274950,83399993099548,333599972397917]