Numbers n such that string 0,4 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =104a(1) =204a(2) =304a(3) =404a(4) =504a(5) =604a(6) =704a(7) =804a(8) =904a(9) =1004a(10) =1049a(11) =1104a(12) =1204a(13) =1304a(14) =1404a(15) =1504a(16) =1604a(17) =1704a(18) =1804a(19) =1904a(20) =2004a(21) =2049a(22) =2104a(23) =2204a(24) =2304a(25) =2404a(26) =2504a(27) =2604a(28) =2704a(29) =2804