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A249241 as a simple table

na(n)
12
22
33
45
511
67
729
817
917
10397
1147
1267
1323
1441
1531
16157
17409
1831
19151
20109
21199
22191
23131
2461
25103
26547
27179
28269
29389
30317
31181
32331
33307
34173
351259
361289
37619
38131
39223
40683
41139
42241
43191
44101
451039
461367
471153
48241
491187
50479
51149
52181
53487
541093
55571
561151
57809
58199
59823
60491
61191
62151
631321
64197
65163
66337
67467
68659
69673
70877
71487
72743
73313
74673
75857
76677
771021

[2,2,3,5,11,7,29,17,17,397,47,67,23,41,31,157,409,
 31,151,109,199,191,131,61,103,547,179,269,389,317,
 181,331,307,173,1259,1289,619,131,223,683,139,241,
 191,101,1039,1367,1153,241,1187,479,149,181,487,
 1093,571,1151,809,199,823,491,191,151,1321,197,
 163,337,467,659,673,877,487,743,313,673,857,677,
 1021]