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A246394
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Nonnegative integers k satisfying cos(k) <= 0 and cos(k+1) >= 0.
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4
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4, 10, 17, 23, 29, 36, 42, 48, 54, 61, 67, 73, 80, 86, 92, 98, 105, 111, 117, 124, 130, 136, 142, 149, 155, 161, 168, 174, 180, 186, 193, 199, 205, 212, 218, 224, 230, 237, 243, 249, 256, 262, 268, 274, 281, 287, 293, 300, 306, 312, 318, 325, 331, 337, 344
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OFFSET
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0,1
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COMMENTS
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LINKS
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MATHEMATICA
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z = 400; f[x_] := Cos[x]
Select[Range[0, z], f[#]*f[# + 1] <= 0 &] (* A062389 *)
Select[Range[0, z], f[#] >= 0 && f[# + 1] <= 0 &] (* A246393 *)
Select[Range[0, z], f[#] <= 0 && f[# + 1] >= 0 &] (* A246394 *)
Select[Range[0, z], f[#]*f[# + 1] > 0 &] (* A246046 *)
Select[Range[0, z], f[#] >= 0 && f[# + 1] >= 0 &] (* A246395 *)
Select[Range[0, z], f[#] <= 0 && f[# + 1] <= 0 &] (* A246396 *)
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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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