%I
%S 14,41,114,149,214,241,314,341,419,441,514,541,614,641,714,741,814,
%T 841,914,941,1014,1041,1114,1149,1214,1241,1314,1341,1499,1514,1541,
%U 1614,1641,1714,1741,1814,1841,1914,1941,2014,2041
%N Numbers n such that 1 and 4 occur juxtaposed in the base 10 representation of n but not of n+1.
%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n],{1,4}]> 0  SequenceCount[IntegerDigits[n],{4,1}]>0,1,0],{n,2100}],{1,0}] [[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Jul 01 2019 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_
