A143588 - OEIS

%I #2 Mar 30 2012 18:57:10

%S 0,1,2,2,3,4,6,10,15,22,33,52,74,113,168,255,377,567,850,1280,1916,

%T 2878,4324,6473,9720,14577,21862,32766,49150,73758,110640,165962,

%U 249013,373405,560201,840358,1260296,1890539,2835987,4253676,6380430,9570746

%N Number of 2's in row n of the Kolakoski fan A143477.

%C A143586 = A143587 + A143588.

%e The first 4 rows of A143477 are 1; 2; 22; 1122. The respective numbers of 1's are 0,1,2,2.

%Y Cf. A000002, A143477, A143486, A143487.

%K nonn

%O 1,3

%A _Clark Kimberling_, Aug 25 2008