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A019381号作为一个简单的表

n个a(n)
12
25
11
417
523
637
747
867
983
1097
11109
12127
13131
14137
15149
16181
17191
18193
19197
20211
21223
22233
23239
24251
25263
26311
27347
28353
29359
30373
31389
32409
33419
34421
35433
36439
37443
38467
39479
40487
41491
42503
43523
44547
45557
46587
47593
48617
49647
50653
51701
52719
53751
54761
55787
56809
57811

[2,5,11,17,23,37,47,67,83,97,109,127,131,137,149,181,191,193,197,211,223,233,239,251,263,311,347,353,359,373,389,409,419,421,433,439,443,467,479,487,491,503,523,547,557,587,593,617,647,653,701,719,751,761,787,809,811]