%I #16 Apr 25 2021 12:18:12
%S 16,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,35,36,37,38,39,40,
%T 41,42,43,44,45,46,47,48,49,50,52,53,54,55,56,57,58,59,60,61,62,63,64,
%U 65,66,67,69,70,71,72,73,74,75,76,77,78,79
%N Numbers whose base16 representation has exactly 2 runs.
%H Robert Israel, <a href="/A043675/b043675.txt">Table of n, a(n) for n = 1..10000</a>
%p N:= 3; # get all results <= 16^N
%p sort([seq(seq(seq(seq((a*(16^n16^k)+b*(16^k1))/15, k=1..n1),n=2..N),
%p b={$0..15} minus {a}),a=1..15)]); # _Robert Israel_, Dec 11 2015
%K nonn,base
%O 1,1
%A _Clark Kimberling_
