A022292 Exactly half of first a(n) terms of Kolakoski sequence A000002 are 1's (not known to be infinite).

2, 4, 6, 8, 10, 14, 16, 18, 20, 22, 24, 26, 28, 30, 36, 38, 40, 42, 44, 46, 48, 50, 54, 56, 58, 60, 62, 64, 68, 70, 72, 74, 76, 78, 80, 82, 86, 88, 98, 104, 106, 116, 118, 122, 124, 126, 128, 130, 132, 136, 138, 140, 142, 144, 146, 148, 150, 152, 158