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A257852 as a simple table

na(n)
13
21
37
413
59
611
75
829
917
1015
1153
1237
1345
1425
1519
1621
17117
1869
1961
2033
2123
22213
23149
24181
25101
2677
2741
2827
2985
30469
31277
32245
33133
3493
3549
3631
37853
38597
39725
40405
41309
42165
43109
4457
4535
46341
471877
481109
49981
50533
51373
52197
53125
5465
5539

[3,1,7,13,9,11,5,29,17,15,53,37,45,25,19,21,117,
 69,61,33,23,213,149,181,101,77,41,27,85,469,277,
 245,133,93,49,31,853,597,725,405,309,165,109,57,
 35,341,1877,1109,981,533,373,197,125,65,39]