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A257245 as a simple table

na(n)
12
23
33
43
53
65
75
83
93
105
117
127
137
143
1519
167
175
185
197
205
2119
2211
2313
2413
2523
2613
2711
2811
2961
3031
3113
3219
3343
3413
357
365
3761
3831
3923
40127
417
42151
4319
44181
4513
4643
4731
48233
4913
5013
517
5211
5319
5431
5559
5631
5731
58163
5941
6041
61113
6211
6319
6419
65409
6641
6741
6841
6919
7041
71113
7229
73167
7413
7517
7611
77179
7819
7919
8013
815

[2,3,3,3,3,5,5,3,3,5,7,7,7,3,19,7,5,5,7,5,19,11,
 13,13,23,13,11,11,61,31,13,19,43,13,7,5,61,31,23,
 127,7,151,19,181,13,43,31,233,13,13,7,11,19,31,59,
 31,31,163,41,41,113,11,19,19,409,41,41,41,19,41,
 113,29,167,13,17,11,179,19,19,13,5]