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A141030
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a(n)=If[Prime[n + 1]^2 - Prime[n]*Prime[n + 2] > 0, If[Mod[Prime[n]*Sqrt[5], 1] >= 0.5, 0, 1], If[Mod[Prime[n]*Sqrt[7], 1] >= 0.5, 2, 3]].
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0
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3, 0, 3, 0, 3, 1, 2, 3, 1, 2, 1, 0, 3, 2, 1, 0, 3, 1, 0, 2, 1, 3, 2, 1, 0, 3, 1, 3, 3, 0, 3, 0, 3, 0, 3, 0, 1, 3, 1, 0, 2, 0, 3, 0, 3, 0, 0, 0, 2, 2, 1, 3, 0, 1, 0, 1, 2, 0, 1, 3, 2, 1, 1, 2, 3, 0, 2, 0, 3, 3, 2, 0, 0, 1, 2, 3, 0, 3, 2, 0, 2, 1, 3, 1, 3, 3, 0, 0, 2, 2, 1, 1, 3, 0, 3, 2, 1, 3, 1, 3
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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f[n_] = If[Prime[n + 1]^2 - Prime[n]*Prime[n + 2] > 0, If[Mod[Prime[n]*Sqrt[5], 1] >= 0.5, 0, 1], If[Mod[Prime[n]*Sqrt[7], 1] >= 0.5, 2, 3]];
Table[f[n], {n, 1, 100}]
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CROSSREFS
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KEYWORD
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nonn,uned,less
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AUTHOR
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STATUS
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approved
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