%I #11 Jul 27 2022 16:35:30
%S 2,3,6,8,9,11,12,15,18,19,21,24,26,27,30,33,35,36,38,39,42,44,45,47,
%T 50,53,54,56,57,60,62,63,65,66,69,72,74,75,77,80,81,83,84,87,89,90,92,
%U 93,96,99,100,102,105,107,108,110,111,114,117,119,120,123,126,127,129,132,135
%N Positions of 2's in Kolakoski sequence (A000002).
%F Numbers n such that A078649(A054353(n-1)-n+2)-A054353(n-1)=1. [_Benoit Cloitre_, Feb 08 2009]
%F Least k such that A054353(k)>=A078649(n). a(n)=A078649(n)-n+1. [_Benoit Cloitre_, Feb 07 2009]
%Y Cf. A000002, A054353, A078649.
%Y Complement: A013947.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_