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A255313 as a simple table

na(n)
13
25
33
47
55
63
77
85
97
105
1111
127
135
147
155
1613
1711
187
195
207
215
2213
2311
2413
2511
267
275
283
2917
3013
3111
3213
3311
347
355
363
3719
3817
3913
4011
4113
4211
437
445
453
4619
4717
4819
4917
5013
5111
527
535
547
555
5623
5719
5817
5919
6017
6113
6211
637
645
657
665
6723
6819
6917
7019
7123
7219
7313

[3,5,3,7,5,3,7,5,7,5,11,7,5,7,5,13,11,7,5,7,5,13,
 11,13,11,7,5,3,17,13,11,13,11,7,5,3,19,17,13,11,
 13,11,7,5,3,19,17,19,17,13,11,7,5,7,5,23,19,17,19,
 17,13,11,7,5,7,5,23,19,17,19,23,19,13]