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A016081 as a simple table

na(n)
13
27
311
451
555
695
799
8301
9503
10705
11907
12119
13321
14523
15725
16927
17139
18341
19543
20745
21947
22159
23361
24563
25765
26967
27179
28381
29583
30785
31987
32199
33302
34603
35706
3617
3712
3861
3956
406
411
425
439
4431
4553
4675
4797
48101
49501
50505
51905
52909
53319
54323
55723
56727
57137
58141
59541

[3,7,11,51,55,95,99,301,503,705,907,119,321,523,
 725,927,139,341,543,745,947,159,361,563,765,967,
 179,381,583,785,987,199,302,603,706,17,12,61,56,6,
 1,5,9,31,53,75,97,101,501,505,905,909,319,323,723,
 727,137,141,541]