login

A253717 as a simple table

na(n)
12
23
35
47
511
613
717
831
953
1071
11101
12131
13157
14173
15181
16197
17211
18283
19431
20439
21457
22461
23487
24509
25571
26601
27643
28727
29911
30929
311021
321031
331033
341051
351093
361151
371163
381171
391201
401231
411249
421259
431301
441303
451327
461373
471399
481429
491451
501453
511493

[2,3,5,7,11,13,17,31,53,71,101,131,157,173,181,
 197,211,283,431,439,457,461,487,509,571,601,643,
 727,911,929,1021,1031,1033,1051,1093,1151,1163,
 1171,1201,1231,1249,1259,1301,1303,1327,1373,1399,
 1429,1451,1453,1493]