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

Terms

a(0) =7a(1) =13a(2) =32a(3) =38a(4) =51a(5) =57a(6) =76a(7) =82a(8) =95a(9) =101a(10) =120a(11) =126a(12) =139a(13) =145a(14) =164a(15) =170a(16) =189a(17) =208a(18) =214a(19) =233a(20) =252a(21) =258a(22) =277a(23) =296a(24) =302a(25) =321a(26) =340a(27) =346a(28) =365a(29) =371