Numbers whose binary expansion has only the digit "1" as first, central and final digit.

A135576

Numbers whose binary expansion has only the digit "1" as first, central and final digit.

Terms

    a(0) =1a(1) =7a(2) =21a(3) =73a(4) =273a(5) =1057a(6) =4161a(7) =16513a(8) =65793a(9) =262657a(10) =1049601a(11) =4196353a(12) =16781313a(13) =67117057a(14) =268451841a(15) =1073774593a(16) =4295032833a(17) =17180000257a(18) =68719738881a(19) =274878431233

External references