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A259260 as a simple table

na(n)
11
27
311
421
529
63
75
813
919
1031
1141
129
1323
1427
1545
1653
1775
1887
19113
2015
2117
2233
2339
2459
2569
2693
2735
2837
2961
3067
3195
32105
3357
3471
3591
36109
37133
38155
39183
40209
4179
4249
43151
44137
4525
4647
4751
4877
4985
5043
5155
5273
5389
54111
55131
56157
57181
58107
59135
6065
6163
6299
63101
64141
65147
66191
6797
68103
69139
70149
71189
72203
73247
74145

[1,7,11,21,29,3,5,13,19,31,41,9,23,27,45,53,75,87,
 113,15,17,33,39,59,69,93,35,37,61,67,95,105,57,71,
 91,109,133,155,183,209,79,49,151,137,25,47,51,77,
 85,43,55,73,89,111,131,157,181,107,135,65,63,99,
 101,141,147,191,97,103,139,149,189,203,247,145]