Positions of check bits in code in A075943.

Terms

a(0) =255a(1) =3855a(2) =13107a(3) =21845a(4) =27306a(5) =38506a(6) =71576a(7) =92115a(8) =101470a(9) =138406a(10) =172589a(11) =240014a(12) =272069a(13) =380556a(14) =536169a(15) =679601a(16) =847140a(17) =1072054a(18) =1258879a(19) =1397519a(20) =2005450a(21) =2121415a(22) =2496892a(23) =2738813a(24) =3993667a(25) =4241896a(26) =4617503a(27) =5821704