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A268083 as a simple table

na(n)
139
255
393
4111
5119
6155
7161
8185
9253
10275
11279
12305
13327
14333
15351
16363
17377
18403
19407
20413
21497
22511
23517
24533
25559
26629
27635
28649
29655
30685
31689
32697
33707
34741
35749
36755
37779
38785
39791
40813
41817
42849
43871
44893
45901
46905
47923
48981
491003
501011
511027
521043

[39,55,93,111,119,155,161,185,253,275,279,305,327,
 333,351,363,377,403,407,413,497,511,517,533,559,
 629,635,649,655,685,689,697,707,741,749,755,779,
 785,791,813,817,849,871,893,901,905,923,981,1003,
 1011,1027,1043]