Numbers k such that A249441(k) = 3.

Terms

a(0) =15a(1) =31a(2) =47a(3) =63a(4) =95a(5) =127a(6) =191a(7) =255a(8) =383a(9) =511a(10) =767a(11) =1023a(12) =1535a(13) =2047a(14) =3071a(15) =4095a(16) =6143a(17) =8191a(18) =12287a(19) =16383a(20) =24575a(21) =32767a(22) =49151a(23) =65535a(24) =98303a(25) =131071a(26) =196607a(27) =262143a(28) =393215a(29) =524287