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A101768 Numbers n such that n, 2n+1, 3n+2, 4n+3, 5n+4, 6n+5, 7n+6 are primes. 4
2894219, 5246009, 8189999, 8678669, 13951559, 18160379, 24765509, 38911949, 40645919, 60041519, 64523969, 108405989, 124028309, 126392699, 132767039, 142738679, 189142589, 242024369, 248451839, 325561319, 354218759, 392136359 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

a={}; Do[p=Prime[n]; If[PrimeQ[p*2+1] && PrimeQ[p*3+2] && PrimeQ[p*4+3] && PrimeQ[p*5+4] && PrimeQ[p*6+5] && PrimeQ[p*7+6], AppendTo[a, p]], {n, 1, 17^5}]; Print[a]; - Vladimir Joseph Stephan Orlovsky, Apr 29 2008

Select[Range[4*10^8], And@@PrimeQ[#*Range[7]+Range[0, 6]]&] (* Harvey P. Dale, Jul 22 2011 *)

CROSSREFS

Cf. A000040, A005384, A067256-A067258, A101767-A101770.

Sequence in context: A204524 A321669 A237944 * A101769 A237210 A209795

Adjacent sequences:  A101765 A101766 A101767 * A101769 A101770 A101771

KEYWORD

nonn,easy

AUTHOR

Jonathan Vos Post and Ray Chandler, Dec 31 2004

STATUS

approved

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Last modified May 19 17:48 EDT 2019. Contains 323395 sequences. (Running on oeis4.)