A026318 a(n) = n-th nonnegative integer k satisfying sin(k) < cos(k) < sin(k+1).

7, 13, 32, 38, 51, 57, 76, 82, 95, 101, 120, 126, 139, 145, 164, 170, 189, 208, 214, 233, 252, 258, 277, 296, 302, 321, 340, 346, 365, 371, 384, 390, 409, 415, 428, 434, 453, 459, 472, 478, 497, 503, 516, 522, 541, 547, 566, 585