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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A111286 as a simple table

na(n)
01
11
22
36
412
524
648
796
8192
9384
10768
111536
123072
136144
1412288
1524576
1649152
1798304
18196608
19393216
20786432
211572864
223145728
236291456
2412582912
2525165824
2650331648
27100663296
28201326592
29402653184
30805306368
311610612736
323221225472

[1,1,2,6,12,24,48,96,192,384,768,1536,3072,6144,
 12288,24576,49152,98304,196608,393216,786432,
 1572864,3145728,6291456,12582912,25165824,
 50331648,100663296,201326592,402653184,805306368,
 1610612736,3221225472]