a(n) is the smallest integer k > 0 such that 10^(-n-1) < |cos(k) - round(cos(k))| < 10^(-n).

A345670

a(n) is the smallest integer k > 0 such that 10^(-n-1) < |cos(k) - round(cos(k))| < 10^(-n).

Terms

    a(0) =1a(1) =3a(2) =11a(3) =44a(4) =22a(5) =16685a(6) =5325a(7) =1775a(8) =710a(9) =355a(10) =104348a(11) =312689a(12) =1146408a(13) =20530996a(14) =10838702a(15) =5419351a(16) =165707065a(17) =411557987

External references