Numbers k such that 2^k mod k = 2^k mod k^2.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =35a(7) =64a(8) =128a(9) =256a(10) =297a(11) =512a(12) =1024a(13) =1093a(14) =2048a(15) =2186a(16) =2590a(17) =3279a(18) =3511a(19) =4096a(20) =4372a(21) =5465a(22) =6558a(23) =7022a(24) =7651a(25) =8192a(26) =8744a(27) =9837a(28) =10533a(29) =10930