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A053641 as a simple table

na(n)
11
21
33
41
55
63
77
81
99
103
1111
125
1313
147
1515
161
1717
183
1919
205
2121
227
2323
249
2525
2611
2727
2813
2929
3015
3131
321
3333
343
3535
365
3737
387
3939
409
4141
4211
4343
4413
4545
4615
4747
4817
4949
5019
5151
5221
5353
5423
5555
5625
5757
5827
5959
6029
6161
6231
6363
641

[1,1,3,1,5,3,7,1,9,3,11,5,13,7,15,1,17,3,19,5,21,
 7,23,9,25,11,27,13,29,15,31,1,33,3,35,5,37,7,39,9,
 41,11,43,13,45,15,47,17,49,19,51,21,53,23,55,25,
 57,27,59,29,61,31,63,1]