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A246300
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Numbers k such that cos(k) < cos(k+1) > cos(k+2).
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4
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5, 12, 18, 24, 30, 37, 43, 49, 56, 62, 68, 74, 81, 87, 93, 100, 106, 112, 118, 125, 131, 137, 144, 150, 156, 162, 169, 175, 181, 187, 194, 200, 206, 213, 219, 225, 231, 238, 244, 250, 257, 263, 269, 275, 282, 288, 294, 301, 307, 313, 319, 326, 332, 338, 345
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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 = 520; f[x_] := f[x] = Cos[x]; t = Range[0, z];
Select[t, f[#] > f[# + 1] &] (* A026311 *)
Select[t, f[#] < f[# + 1] > f[# + 2] &] (* A246300 *)
Select[t, f[#] < f[# + 1] < f[# + 2] > f[# + 3] &] (* A246301 *)
Select[t, f[#] < f[# + 1] < f[# + 2] < f[# + 3] > f[# + 4] &] (* A246302 *)
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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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