login

A239126 as a simple table

na(n)
13
27
37
411
515
615
715
823
931
1031
1119
1231
1347
1463
1563
1623
1739
1863
1995
20127
21127
2227
2347
2479
25127
26191
27255
28255
2931
3055
3195
32159
33255
34383
35511
36511
3735
3863
39111
40191
41319
42511
43767
441023
451023
4639
4771
48127
49223
50383
51639
521023
531535
542047
552047

[3,7,7,11,15,15,15,23,31,31,19,31,47,63,63,23,39,
 63,95,127,127,27,47,79,127,191,255,255,31,55,95,
 159,255,383,511,511,35,63,111,191,319,511,767,
 1023,1023,39,71,127,223,383,639,1023,1535,2047,
 2047]