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A087418 as a simple table

na(n)
12
23
33
43
55
65
75
85
97
107
117
127
137
1411
1511
1611
1713
1813
1919
2023
2123
2229
2331
2437
2537
2641
2741
2841
2941
3041
3143
3253
3359
3461
3567
3667
3771
3873
3989
4089
4197
4297
43101
44101
45103
46103
47107
48137
49137
50173
51173
52179
53181
54191
55193
56197
57211
58223
59227
60227
61239
62251
63257
64263
65293
66311

[2,3,3,3,5,5,5,5,7,7,7,7,7,11,11,11,13,13,19,23,
 23,29,31,37,37,41,41,41,41,41,43,53,59,61,67,67,
 71,73,89,89,97,97,101,101,103,103,107,137,137,173,
 173,179,181,191,193,197,211,223,227,227,239,251,
 257,263,293,311]