Number of 1's in row n of A143589 (a Kolakoski fan).

Terms

a(0) =1a(1) =0a(2) =2a(3) =1a(4) =2a(5) =1a(6) =4a(7) =4a(8) =8a(9) =12a(10) =18a(11) =28a(12) =40a(13) =60a(14) =91a(15) =134a(16) =203a(17) =302a(18) =455a(19) =681a(20) =1019a(21) =1535a(22) =2292a(23) =3447a(24) =5157a(25) =7759a(26) =11617a(27) =17458a(28) =26172a(29) =39270