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A105656 Numbers n such that p1=2n+3, p2=4n+5, p3=6n+7, p4=8n+9, p5=10n+11, p6=12n+13 and p7=14n+15 are all prime. 2
256409, 4112429, 11120339, 12231449, 13243229, 31435739, 46892264, 49798979, 69909839, 98237474, 125994749, 145989164, 171741989, 201038564, 205739414, 229298684, 232560509, 253539929, 259765694, 261519719, 292721519, 296504669 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

MATHEMATICA

apQ[n_]:=And@@PrimeQ[Table[n*i+i+1, {i, 2, 14, 2}]]; Select[Range[ 300000000], apQ] (* Harvey P. Dale, Jan 02 2013 *)

CROSSREFS

Cf. A005382, A005383, A105610, A105652 - A105657.

Sequence in context: A053076 A083604 A236600 * A105657 A251883 A251165

Adjacent sequences:  A105653 A105654 A105655 * A105657 A105658 A105659

KEYWORD

nonn

AUTHOR

Zak Seidov, Apr 16 2005

STATUS

approved

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Last modified April 19 06:10 EDT 2021. Contains 343105 sequences. (Running on oeis4.)