This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A246441 Nonnegative integers k satisfying cos(k) < sec(k+1). 2
 0, 4, 5, 6, 10, 11, 12, 13, 17, 18, 19, 23, 24, 25, 29, 30, 31, 36, 37, 38, 42, 43, 44, 48, 49, 50, 54, 55, 56, 57, 61, 62, 63, 67, 68, 69, 73, 74, 75, 80, 81, 82, 86, 87, 88, 92, 93, 94, 98, 99, 100, 101, 105, 106, 107, 111, 112, 113, 117, 118, 119, 124 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS k is taken in radians. Also, the nonnegative integers k satisfying sin(k) < sec(k+1). LINKS Clark Kimberling, Table of n, a(n) for n = 1..1000 MATHEMATICA z = 200; Select[Range[0, z], Cos[#] > Sec[# + 1] &] (* A246440 *) Select[Range[0, z], Cos[#] < Sec[# + 1] &] (* A246441 *) PROG (PARI) select(n -> cos(n)<1/cos(n+1), [0..200]) \\ Edward Jiang, Sep 01 2014 CROSSREFS Cf. A246440. Sequence in context: A028280 A120520 A213523 * A026312 A070751 A047258 Adjacent sequences:  A246438 A246439 A246440 * A246442 A246443 A246444 KEYWORD nonn,easy AUTHOR Clark Kimberling, Aug 26 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 18 23:39 EDT 2019. Contains 328211 sequences. (Running on oeis4.)