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A033679 as a simple table

na(n)
12
23
33
43
53
621
753
869
981
10139
11143
12223
13233
14261
15261
16399
17553
18609
19659
20673
211017
221187
231357
241571
251641
261839
272151
282191
292499
302511
312607
322667
332681
343081
353351
364291
374319
384353
394489
404733
414819
426003
436011
446631
456797
467113
477429
487547
497651

[2,3,3,3,3,21,53,69,81,139,143,223,233,261,261,
 399,553,609,659,673,1017,1187,1357,1571,1641,1839,
 2151,2191,2499,2511,2607,2667,2681,3081,3351,4291,
 4319,4353,4489,4733,4819,6003,6011,6631,6797,7113,
 7429,7547,7651]