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A246303
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Numbers k such that cos(k) < cos(k+1).
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11
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3, 4, 5, 9, 10, 11, 12, 16, 17, 18, 22, 23, 24, 28, 29, 30, 35, 36, 37, 41, 42, 43, 47, 48, 49, 53, 54, 55, 56, 60, 61, 62, 66, 67, 68, 72, 73, 74, 79, 80, 81, 85, 86, 87, 91, 92, 93, 97, 98, 99, 100, 104, 105, 106, 110, 111, 112, 116, 117, 118, 123, 124
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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z = 500; f[x_] := f[x] = Cos[x]; t = Range[0, z];
Select[t, f[#] < f[# + 1] &] (* A246303 *)
Select[t, f[#] > f[# + 1] < f[# + 2] &] (* A246304 *)
Select[t, f[#] > f[# + 1] > f[# + 2] < f[# + 3] &] (* A246305 *)
Select[t, f[#] > f[# + 1] > f[# + 2] > f[# + 3] < f[# + 4] &] (* A246306 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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