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A178472 as a simple table

na(n)
10
21
31
42
51
65
71
88
94
1017
111
1238
131
1465
1519
16128
171
18284
191
20518
2167
221025
231
242168
2516
264097
27256
288198
291
3016907
311
3232768
331027
3465537
3579
36133088
371
38262145
394099
40524408
411
421056731
431
442097158
4516636
464194305
471
488421248
4964
5016777712
5165539

[0,1,1,2,1,5,1,8,4,17,1,38,1,65,19,128,1,284,1,
 518,67,1025,1,2168,16,4097,256,8198,1,16907,1,
 32768,1027,65537,79,133088,1,262145,4099,524408,1,
 1056731,1,2097158,16636,4194305,1,8421248,64,
 16777712,65539]