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A066886 as a simple table

na(n)
15
215
365
4175
5671
61105
72465
83439
96095
1012209
1114911
1225345
1334481
1439775
1551935
1674465
17102719
18113521
19150415
20178991
21194545
22246559
23285935
24352529
25456385
26515201
27546415
28612575
29647569
30721505
311024255
321124111
331285745

[5,15,65,175,671,1105,2465,3439,6095,12209,14911,
 25345,34481,39775,51935,74465,102719,113521,
 150415,178991,194545,246559,285935,352529,456385,
 515201,546415,612575,647569,721505,1024255,
 1124111,1285745]