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A256872 as a simple table

na(n)
123
231
345
447
561
693
795
8119
9125
10127
11175
12187
13189
14191
15239
16247
17253
18255
19335
20357
21359
22363
23369
24379
25381
26383
27431
28439
29455
30477
31485
32491
33493
34495
35507
36509
37511
38573
39575
40631
41637
42639
43669
44671

[23,31,45,47,61,93,95,119,125,127,175,187,189,191,
 239,247,253,255,335,357,359,363,369,379,381,383,
 431,439,455,477,485,491,493,495,507,509,511,573,
 575,631,637,639,669,671]