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A289768 as a simple table

na(n)
01
11
23
33
45
55
613
713
817
917
1059
1159
1281
1381
14219
15219
16257
17257
18899
19899
201349
211349
223437
233437
244353
254353
2615235
2715235
2820805
2920805
3056173
3156173
3265537
3365537
34229379
35229379
36344069
37344069
38876557
39876557
401118225
411118225
423913787
433913787

[1,1,3,3,5,5,13,13,17,17,59,59,81,81,219,219,257,
 257,899,899,1349,1349,3437,3437,4353,4353,15235,
 15235,20805,20805,56173,56173,65537,65537,229379,
 229379,344069,344069,876557,876557,1118225,
 1118225,3913787,3913787]