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A285281 as a simple table

na(n)
41
54
61
716
85
91
1064
1123
126
131
14256
15101
1630
177
181
191024
20467
21138
2237
238
241
254096
262165
27694
28175
2944
309
311
3216384
3310055
343526
35925
36212
3751
3810
391
4065536
4146709
4218012
434977
441156
45249
4658
4711
481
49262144
50216995
5192140
5227067
536428
541387
55286
5665
5712
581

[1,4,1,16,5,1,64,23,6,1,256,101,30,7,1,1024,467,
 138,37,8,1,4096,2165,694,175,44,9,1,16384,10055,
 3526,925,212,51,10,1,65536,46709,18012,4977,1156,
 249,58,11,1,262144,216995,92140,27067,6428,1387,
 286,65,12,1]