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A246450 Nonnegative integers k satisfying sin(k)*cos(k+1) < 0. 4
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 17, 18, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 36, 37, 39, 40, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..1000

MATHEMATICA

z = 200;

Select[Range[0, z], Sin[#] Cos[# + 1] < 0 &]  (* A246450 *)

Select[Range[0, z], Sin[#] Cos[# + 1] > 0 &]  (* A246451 *)

CROSSREFS

Cf. A246451 (complement of A246450), A246442.

Sequence in context: A028830 A327749 A171828 * A049814 A028828 A334139

Adjacent sequences:  A246447 A246448 A246449 * A246451 A246452 A246453

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Aug 26 2014

STATUS

approved

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Last modified September 29 11:07 EDT 2020. Contains 337429 sequences. (Running on oeis4.)