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A031468 as a simple table

na(n)
163
2127
3191
4223
5239
6247
7251
8253
9254
10383
11447
12479
13495
14503
15507
16509
17510
18639
19703
20735
21751
22759
23763
24765
25766
26831
27863
28879
29887
30891
31893
32894
33927
34943
35951
36955
37957
38958
39975
40983
41987
42989
43990
44999
451003
461005

[63,127,191,223,239,247,251,253,254,383,447,479,
 495,503,507,509,510,639,703,735,751,759,763,765,
 766,831,863,879,887,891,893,894,927,943,951,955,
 957,958,975,983,987,989,990,999,1003,1005]