Numbers n such that string 6,3 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =63a(1) =163a(2) =263a(3) =363a(4) =463a(5) =563a(6) =639a(7) =663a(8) =763a(9) =863a(10) =963a(11) =1063a(12) =1163a(13) =1263a(14) =1363a(15) =1463a(16) =1563a(17) =1639a(18) =1663a(19) =1763a(20) =1863a(21) =1963a(22) =2063a(23) =2163a(24) =2263a(25) =2363a(26) =2463a(27) =2563a(28) =2639a(29) =2663