Integers with the same number of zeros in base 10 and base 2.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =15a(5) =30a(6) =31a(7) =63a(8) =127a(9) =255a(10) =503a(11) =507a(12) =509a(13) =510a(14) =511a(15) =1003a(16) =1005a(17) =1006a(18) =1015a(19) =1019a(20) =1020a(21) =1021a(22) =1022a(23) =2007a(24) =2015a(25) =2030a(26) =2031a(27) =2039a(28) =2043a(29) =2045