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A247872 as a simple table

na(n)
25
37
45
57
65
711
817
95
107
1119
125
1311
147
155
1613
175
1811
1923
205
2119
227
235
2413
257
265
2717
285
297
3013
315
3223
337
345
3529
3617
375
3811
3913
405
4131
427
4337
4419
455
4611
477
485
4917
505
517
5211
535
5429
557
565
5717
5811
595
6031
6123
6241
635
6413
657
665
6719
687
695
7013
715
727
735
7423
757
765
7719
7811
7931
805
815
827
8311
845
8537
867
875
8847
8953
9011
915
927
9343
9413
955
967

[5,7,5,7,5,11,17,5,7,19,5,11,7,5,13,5,11,23,5,19,
 7,5,13,7,5,17,5,7,13,5,23,7,5,29,17,5,11,13,5,31,
 7,37,19,5,11,7,5,17,5,7,11,5,29,7,5,17,11,5,31,23,
 41,5,13,7,5,19,7,5,13,5,7,5,23,7,5,19,11,31,5,5,7,
 11,5,37,7,5,47,53,11,5,7,43,13,5,7]