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A246296
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Numbers k such that sin(k) < sin(k+1) < sin(k+2) < sin(k+3) > sin(k+4).
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4
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5, 11, 17, 24, 30, 36, 43, 49, 55, 61, 68, 74, 80, 87, 93, 99, 105, 112, 118, 124, 131, 137, 143, 149, 156, 162, 168, 174, 181, 187, 193, 200, 206, 212, 218, 225, 231, 237, 244, 250, 256, 262, 269, 275, 281, 288, 294, 300, 306, 313, 319, 325, 332, 338, 344
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OFFSET
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1,1
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COMMENTS
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Numbers like 42, 86, 130, 199, 243, 287,.. are in none of these 4 sequences. - R. J. Mathar, May 18 2020
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LINKS
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MATHEMATICA
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z = 500; f[x_] := f[x] = Sin[x]; t = Range[0, z];
Select[t, f[#] > f[# + 1] &] (* A246293 *)
Select[t, f[#] < f[# + 1] > f[# + 2] &] (* A246294 *)
Select[t, f[#] < f[# + 1] < f[# + 2] > f[# + 3] &] (* A246295 *)
Select[t, f[#] < f[# + 1] < f[# + 2] < f[# + 3] > f[# + 4] &] (* A246296 *)
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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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