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Search: id:A090095
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| A090095 |
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a(n) is the smallest composite number coprime to n, n+1, n+2, n+3, n+4 and n+5. |
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+0
2
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| 49, 121, 121, 121, 121, 169, 169, 49, 289, 289, 289, 121, 121, 121, 49, 121, 169, 169, 169, 169, 289, 49, 121, 121, 121, 121, 121, 169, 49, 169, 169, 169, 169, 121, 121, 49, 121, 121, 289, 169, 169, 169, 49, 169, 121, 121, 121, 121, 121, 49, 361, 289, 169, 169
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A053674[n]^2
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MATHEMATICA
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m=0; Table[fla=1; Do[s=GCD[n, k]; s1=GCD[n, k+1]; s2=GCD[n, k+2]; s3=GCD[n, k+3]; s4=GCD[n, k+4]; s5=GCD[n, k+5]; If[Equal[s, 1]&&Equal[s1, 1]&&Equal[s2, 1]&&Equal[s3, 1]&& Equal[s4, 1]&&Equal[s5, 1]&&!PrimeQ[n]&&!Equal[n, 1]&&Equal[fla, 1], m=m+1; Print[n]; fla=0], {n, 1, 1000}], {k, 1, 256}]
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CROSSREFS
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Cf. A053669-A053674, A090090-A090094.
Adjacent sequences: A090092 A090093 A090094 this_sequence A090096 A090097 A090098
Sequence in context: A088868 A044236 A044617 this_sequence A084733 A115557 A080665
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Nov 26 2003
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