Numbers n such that the binary XOR of the divisors of n (A178910(n)) is a binary repunit (A000225).

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =128a(8) =256a(9) =512a(10) =1024a(11) =2048a(12) =2592a(13) =4096a(14) =8192a(15) =16384a(16) =32768a(17) =65536a(18) =131072a(19) =262144a(20) =524288a(21) =1048576a(22) =2097152a(23) =2458624a(24) =4194304a(25) =8388608a(26) =16777216a(27) =33554432a(28) =67108864a(29) =134217728