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Search: id:A166003
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| A166003 |
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Primes p such that p+-1, p+-2 and p+-3 are not squarefree. |
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| 47527, 186247, 218527, 245149, 269953, 377543, 390449, 432277, 447823, 453053, 469649, 518123, 568177, 584911, 589273, 606323, 632347, 661547, 761347, 831751, 848213, 897577, 913327, 925949, 952253, 1172351, 1205647, 1220347, 1241477
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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f[n_]:=Max[Last/@FactorInteger[n]]; q=2; lst={}; Do[p=Prime[n]; If[f[p-3]>=q&&f[p-2]>=q&&f[p-1]>=q&&f[p+1]>=q&&f[p+2]>=q&&f[p+3]>=q, AppendTo[lst, p]], {n, 6*8!}]; lst
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CROSSREFS
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Cf. A086708, A086709, A089199, A089200, A089212, A166000, A166001, A166002
Sequence in context: A109030 A093223 A069370 this_sequence A043615 A156117 A031867
Adjacent sequences: A166000 A166001 A166002 this_sequence A166004 A166005 A166006
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 03 2009
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EXTENSIONS
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Edited by N. J. A. Sloane, Oct 04 2009
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