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A130971 as a simple table

na(n)
12
22
33
43
53
63
713
83
97
103
1123
125
1323
1411
1517
1611
175
183
193
207
2141
2247
2319
2473
2531
2637
2771
2843
2919
3097
31131
323
3373
3411
35107
3623
3729
38131
3989
4083
41163
4253
43127
44191
4559
4671
4783
48191
4929
50101
5123
5217
53113
545
55193
567
5713
58239
59149
60277
61229
6237
63179
64307
65199
6661
67181
68353
69283

[2,2,3,3,3,3,13,3,7,3,23,5,23,11,17,11,5,3,3,7,41,
 47,19,73,31,37,71,43,19,97,131,3,73,11,107,23,29,
 131,89,83,163,53,127,191,59,71,83,191,29,101,23,
 17,113,5,193,7,13,239,149,277,229,37,179,307,199,
 61,181,353,283]