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A283569 as a simple table

na(n)
15
2282
34313
467892
5945100
612699250
7164714523
82089140956
926034179747
10320066184088
113892257109768
1246912556808052
13561231923565665
146671995763846662
1578889299491699749
16928412437363667396

[5,282,4313,67892,945100,12699250,164714523,
 2089140956,26034179747,320066184088,3892257109768,
 46912556808052,561231923565665,6671995763846662,
 78889299491699749,928412437363667396]