The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A155143 Primes p such that p-+2, p-+4, p-+6 are squarefree. 2
 17, 37, 89, 107, 109, 197, 199, 233, 307, 397, 433, 449, 467, 487, 557, 593, 613, 647, 683, 701, 757, 809, 811, 883, 953, 991, 1009, 1061, 1063, 1097, 1117, 1151, 1153, 1259, 1297, 1459, 1493, 1511, 1549, 1601, 1637, 1657, 1693, 1747, 1783, 1889, 1997 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms == 1 or 8 mod 9. - Robert Israel, Jun 19 2016 LINKS John Cerkan, Table of n, a(n) for n = 1..10000 MAPLE filter:= t -> isprime(t) and andmap(numtheory:-issqrfree, [seq(seq(t+s*j, s=[-1, 1]), j=[2, 4, 6])]): select(filter, [seq(seq(i+j, j=[-1, 1]), i=9..1000, 9)]); # Robert Israel, Jun 19 2016 MATHEMATICA Select[Prime@ Range@ 302, Times @@ Boole@ Map[SquareFreeQ, # + (2 Range@ 7 - 8)] == 1 &] (* Michael De Vlieger, Jun 18 2016 *) CROSSREFS Cf. A153213, A049282, A155139, A155140, A155141, A155142 Sequence in context: A093930 A048880 A075892 * A261529 A141886 A350096 Adjacent sequences: A155140 A155141 A155142 * A155144 A155145 A155146 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Jan 21 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 19 16:35 EDT 2024. Contains 373503 sequences. (Running on oeis4.)