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A166684 as a simple table

na(n)
11
22
33
44
55
67
79
811
913
1017
1119
1223
1325
1429
1531
1637
1741
1843
1947
2049
2153
2259
2361
2467
2571
2673
2779
2883
2989
3097
31101
32103
33107
34109
35113
36121
37127
38131
39137
40139
41149
42151
43157
44163
45167
46169
47173
48179
49181
50191
51193
52197
53199
54211
55223
56227
57229
58233
59239
60241
61251

[1,2,3,4,5,7,9,11,13,17,19,23,25,29,31,37,41,43,
 47,49,53,59,61,67,71,73,79,83,89,97,101,103,107,
 109,113,121,127,131,137,139,149,151,157,163,167,
 169,173,179,181,191,193,197,199,211,223,227,229,
 233,239,241,251]