login

A156221 as a simple table

na(n)
13
25
311
413
519
631
741
843
953
1059
11113
12131
13139
14149
15151
16191
17193
18311
19349
20359
21419
22431
23439
24491
25541
26593
27911
28941
29953
301153
311193
321319
331439
341451
351453
361459
371493
381531
391543
401549
411913
421931
431951
443119
453191
463491
473511
483541
493911
504139

[3,5,11,13,19,31,41,43,53,59,113,131,139,149,151,
 191,193,311,349,359,419,431,439,491,541,593,911,
 941,953,1153,1193,1319,1439,1451,1453,1459,1493,
 1531,1543,1549,1913,1931,1951,3119,3191,3491,3511,
 3541,3911,4139]