Numbers n such that string 3,3 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =33a(1) =133a(2) =233a(3) =339a(4) =433a(5) =533a(6) =633a(7) =733a(8) =833a(9) =933a(10) =1033a(11) =1133a(12) =1233a(13) =1339a(14) =1433a(15) =1533a(16) =1633a(17) =1733a(18) =1833a(19) =1933a(20) =2033a(21) =2133a(22) =2233a(23) =2339a(24) =2433a(25) =2533a(26) =2633a(27) =2733a(28) =2833a(29) =2933