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A028691 as a simple table

na(n)
11
22
33
45
54
67
711
813
917
1019
119
1223
1329
1431
1537
168
1741
1843
1947
2053
2159
2261
2367
2471
2573
2679
2783
2889
2997
30101
31103
32107
33109
3415
35113
36127
37131
38137
39139
40149
41151
42157
43163
44167
45173
46179
47181
48191
49193
50197
51199
52211
53223
54227
55229
56233
57239
58241
59251
60257

[1,2,3,5,4,7,11,13,17,19,9,23,29,31,37,8,41,43,47,
 53,59,61,67,71,73,79,83,89,97,101,103,107,109,15,
 113,127,131,137,139,149,151,157,163,167,173,179,
 181,191,193,197,199,211,223,227,229,233,239,241,
 251,257]