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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
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
Sequence in context: A093930 A048880 A075892 * A261529 A141886 A350096
KEYWORD
nonn
AUTHOR
STATUS
approved

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