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Search: id:A089724
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| A089724 |
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Numbers p satisfying the following conditions: p is a prime of form 10k+9 and the function f[p,7,10] applied to p is not greater than 5, where f[p,7,10]=10*fractionalpart[n/70]=1*.((n/70)-Floor[n/70]). |
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1
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| 19, 29, 79, 89, 149, 229, 239, 359, 379, 439, 449, 499, 509, 569, 659, 709, 719, 859, 919, 929, 1009, 1069, 1129, 1279, 1289, 1409, 1429, 1489, 1499, 1549, 1559, 1619, 1699, 1709, 1759, 1979, 2039, 2129, 2179, 2269, 2339, 2389, 2399, 2459, 2539, 2549
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OFFSET
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1,1
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MATHEMATICA
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f[x_, d_, m_] := Mod[x/d, m] or alternatively f[x_, d_, m_] := m*(x/(d*m)-Floor[x/(d*m)]); Do[If[PrimeQ[n]&&Equal[Mod[n, 10], 9]]&&!Greater[f[n, 7, 10], 5], Print[n]], {n, 1, 1000}]
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CROSSREFS
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Cf. A034433.
Sequence in context: A136071 A088998 A139886 this_sequence A038542 A166659 A038672
Adjacent sequences: A089721 A089722 A089723 this_sequence A089725 A089726 A089727
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jan 07 2004
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EXTENSIONS
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Edited by Labos, E., Jan 24 2004
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