A026311 n-th nonnegative integer k satisfying cos(k) > cos(k+1).

0, 1, 2, 6, 7, 8, 13, 14, 15, 19, 20, 21, 25, 26, 27, 31, 32, 33, 34, 38, 39, 40, 44, 45, 46, 50, 51, 52, 57, 58, 59, 63, 64, 65, 69, 70, 71, 75, 76, 77, 78, 82, 83, 84, 88, 89, 90, 94, 95, 96, 101, 102, 103, 107, 108, 109, 113, 114, 115