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A039739 as a simple table

na(n)
21
31
43
53
61
75
83
93
105
113
121
135
143
1511
165
173
181
197
203
211
223
233
245
259
265
273
2811
299
305
317
323
335
343
359
367
371
383
3911
405
4115
4213
433
441
455
463
473
483
4927
5025
5121
5215
5313
543
555
5611
575
583
591
6017
6115
625
637
643
651
669
673
689
6911
709
715
723
7315
749
753
763
775
781
7921
8013
813
821

[1,1,3,3,1,5,3,3,5,3,1,5,3,11,5,3,1,7,3,1,3,3,5,9,
 5,3,11,9,5,7,3,5,3,9,7,1,3,11,5,15,13,3,1,5,3,3,3,
 27,25,21,15,13,3,5,11,5,3,1,17,15,5,7,3,1,9,3,9,
 11,9,5,3,15,9,3,3,5,1,21,13,3,1]