A101768 Numbers n such that n, 2n+1, 3n+2, 4n+3, 5n+4, 6n+5, 7n+6 are primes.

2894219, 5246009, 8189999, 8678669, 13951559, 18160379, 24765509, 38911949, 40645919, 60041519, 64523969, 108405989, 124028309, 126392699, 132767039, 142738679, 189142589, 242024369, 248451839, 325561319, 354218759, 392136359

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