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A246297
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Numbers k such that sin(k) > sin(k+1) < sin(k+2).
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4
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4, 10, 16, 23, 29, 35, 41, 48, 54, 60, 67, 73, 79, 85, 92, 98, 104, 111, 117, 123, 129, 136, 142, 148, 155, 161, 167, 173, 180, 186, 192, 198, 205, 211, 217, 224, 230, 236, 242, 249, 255, 261, 268, 274, 280, 286, 293, 299, 305, 312, 318, 324, 330, 337, 343
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OFFSET
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1,1
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COMMENTS
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Numbers like 20, 64, 108, 152,... 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] &] (* A026309 *)
Select[t, f[#] > f[# + 1] < f[# + 2] &] (* A246297 *)
Select[t, f[#] > f[# + 1] > f[# + 2] < f[# + 3] &] (* A246298 *)
Select[t, f[#] > f[# + 1] > f[# + 2] > f[# + 3] < f[# + 4] &] (* A246299 *)
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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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EXTENSIONS
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STATUS
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approved
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