Positions of 1's in Kolakoski sequence (A000002).

Terms

a(0) =1a(1) =4a(2) =5a(3) =7a(4) =10a(5) =13a(6) =14a(7) =16a(8) =17a(9) =20a(10) =22a(11) =23a(12) =25a(13) =28a(14) =29a(15) =31a(16) =32a(17) =34a(18) =37a(19) =40a(20) =41a(21) =43a(22) =46a(23) =48a(24) =49a(25) =51a(26) =52a(27) =55a(28) =58a(29) =59