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A059478 as a simple table

na(n)
11
21
33
47
57
615
715
85
931
1031
1131
1231
1331
1431
1563
169
1721
1863
1963
2063
2163
2263
2321
24127
25127
26127
27127
28127
29127
30127
31127
32127
33127
34127
35127
36127
37127
38127
39127
40127
41127
4251
43255
44255
45255
4617
4785
48255
49255
50255
51255
52255
53255
5485
5585
56255
5785
58255
5951
6085
61255

[1,1,3,7,7,15,15,5,31,31,31,31,31,31,63,9,21,63,
 63,63,63,63,21,127,127,127,127,127,127,127,127,
 127,127,127,127,127,127,127,127,127,127,51,255,
 255,255,17,85,255,255,255,255,255,255,85,85,255,
 85,255,51,85,255]