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A257691 as a simple table

na(n)
11
22
33
45
57
611
713
817
919
1023
1125
1229
1331
1437
1541
1643
1747
1853
1959
2061
2167
2271
2373
2479
2583
2689
2795
2897
29101
30103
31107
32109
33111
34113
35119
36121
37123
38125
39127
40131
41137
42139
43149
44151
45157
46163
47167
48169
49173
50179
51181
52187
53191
54193
55197
56199
57211
58219
59221
60223
61227
62229
63233
64239
65241
66247
67251
68257

[1,2,3,5,7,11,13,17,19,23,25,29,31,37,41,43,47,53,
 59,61,67,71,73,79,83,89,95,97,101,103,107,109,111,
 113,119,121,123,125,127,131,137,139,149,151,157,
 163,167,169,173,179,181,187,191,193,197,199,211,
 219,221,223,227,229,233,239,241,247,251,257]