%I
%S 1,2,3,4,5,6,13,35,42,43,91,92,250,251,299,300,307,642,643,650,1750,
%T 1757,1758,2093,2100,2101,2149,2150,4494,4501,4502,4550,4551,12255,
%U 12256,12304,12305,12312,14656,14657,14705,14706,14713
%N If d,e are consecutive digits of n in base 7, then de>=5.
%H Harvey P. Dale, <a href="/A032995/b032995.txt">Table of n, a(n) for n = 1..200</a>
%t Select[Range[15000],Min[Abs[IntegerDigits[#,7]//Differences]]>4&] (* _Harvey P. Dale_, Aug 15 2017 *)
%K nonn,base
%O 1,2
%A _Clark Kimberling_
