%I #9 Apr 21 2021 03:57:27
%S 1,2,3,4,5,6,7,8,9,10,11,12,169,183,197,211,225,239,253,267,281,295,
%T 309,323,337,338,352,366,380,394,408,422,436,450,464,478,492,506,507,
%U 521,535,549,563,577,591,605,619,633,647,661,675
%N Numbers whose base-13 run lengths alternate: odd, even, odd, ...
%K nonn,base
%O 1,2
%A _Clark Kimberling_