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

Terms

a(0) =14a(1) =114a(2) =149a(3) =214a(4) =314a(5) =414a(6) =514a(7) =614a(8) =714a(9) =814a(10) =914a(11) =1014a(12) =1114a(13) =1149a(14) =1214a(15) =1314a(16) =1499a(17) =1514a(18) =1614a(19) =1714a(20) =1814a(21) =1914a(22) =2014a(23) =2114a(24) =2149a(25) =2214a(26) =2314a(27) =2414a(28) =2514a(29) =2614