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A196381 as a simple table

na(n)
11
213
31
411
511
637
723
873
913
1047
11121
1259
13181
1423
15107
1683
17253
181
19337
2061
21191
22143
23433
24179
25541
2613
2771
2897
29299
3011
31661
32263
33793
3411
35431
36311
3737
38143
39193
40587
41419
42479
43253
44767
4547
4613
4761
48611
49239
50683
5171
5223
5359
54397
55109
56359
57481

[1,13,1,11,11,37,23,73,13,47,121,59,181,23,107,83,
 253,1,337,61,191,143,433,179,541,13,71,97,299,11,
 661,263,793,11,431,311,37,143,193,587,419,479,253,
 767,47,13,61,611,239,683,71,23,59,397,109,359,481]