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A257041 as a simple table

na(n)
13
24
35
49
519
625
734
870
982
10718
112035
122494
133369
143953
154219
168524
1730943
1849375
1952082
20139670
21303255

[3,4,5,9,19,25,34,70,82,718,2035,2494,3369,3953,
 4219,8524,30943,49375,52082,139670,303255]