A043240 - OEIS

%I #8 Aug 23 2021 21:46:29

%S 34,43,134,143,234,243,334,340,430,443,534,543,634,643,734,743,834,

%T 843,934,943,1034,1043,1134,1143,1234,1243,1334,1340,1430,1443,1534,

%U 1543,1634,1643,1734,1743,1834,1843,1934,1943,2034

%N Numbers k such that 3 and 4 occur juxtaposed in the base-10 representation of k but not of k-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_