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A252636 as a simple table

na(n)
13162
28253
329463
495904
5395940
61504636
75124134
821431528
982893234
10292817550
111230551308
124802902204
1317419191296
1473465113332
15288429221652
161065039430488
174502736844068
1817743381508580
1966283907402424

[3162,8253,29463,95904,395940,1504636,5124134,
 21431528,82893234,292817550,1230551308,4802902204,
 17419191296,73465113332,288429221652,
 1065039430488,4502736844068,17743381508580,
 66283907402424]