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A290838 as a simple table

na(n)
02
12
23
35
45
57
67
713
811
911
1011
1113
1213
1319
1417
1517
1617
1719
1819
1937
2023
2123
2223
2329
2429
2531
2629
2729
2829
2931
3031
3137
3237
3341
3437
3537
3637
3743
3841
3941
4041
4143
4243
4361
4447
4547
4647
4753
4853
4967
5053
5153
5253
5359
5459
5561
5659
5759
5859
5961
6061
6167
6267
6371
6467
6567
6667
6773

[2,2,3,5,5,7,7,13,11,11,11,13,13,19,17,17,17,19,
 19,37,23,23,23,29,29,31,29,29,29,31,31,37,37,41,
 37,37,37,43,41,41,41,43,43,61,47,47,47,53,53,67,
 53,53,53,59,59,61,59,59,59,61,61,67,67,71,67,67,
 67,73]