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A023690 as a simple table

na(n)
1255
2383
3447
4479
5495
6503
7507
8509
9510
10639
11703
12735
13751
14759
15763
16765
17766
18831
19863
20879
21887
22891
23893
24894
25927
26943
27951
28955
29957
30958
31975
32983
33987
34989
35990
36999
371003
381005
391006
401011
411013
421014
431017

[255,383,447,479,495,503,507,509,510,639,703,735,
 751,759,763,765,766,831,863,879,887,891,893,894,
 927,943,951,955,957,958,975,983,987,989,990,999,
 1003,1005,1006,1011,1013,1014,1017]