Composite numbers such that all divisors >1 have the same number of 1's in binary representation.

Terms

a(0) =4a(1) =8a(2) =9a(3) =16a(4) =32a(5) =49a(6) =64a(7) =128a(8) =133a(9) =256a(10) =259a(11) =512a(12) =961a(13) =1024a(14) =2048a(15) =2059a(16) =2449a(17) =3713a(18) =4096a(19) =4681a(20) =4867a(21) =6169a(22) =6241a(23) =8192a(24) =8401a(25) =8773a(26) =9353a(27) =10261a(28) =10561a(29) =12307