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A068872 as a simple table

na(n)
1121
2341
3451
4671
5781
6961
71111
81271
91331
101441
111661
121681
131891
141991
152101
162201
172321
182501
192651
202761
212911
222981
233091
243131
253421
263641
273721
283751
294061
304141
314331
324411
334631
344681
354741
364961
375041
385071
395371
405401
415611
425731
435921

[121,341,451,671,781,961,1111,1271,1331,1441,1661,
 1681,1891,1991,2101,2201,2321,2501,2651,2761,2911,
 2981,3091,3131,3421,3641,3721,3751,4061,4141,4331,
 4411,4631,4681,4741,4961,5041,5071,5371,5401,5611,
 5731,5921]